.gitignore

@@ -481,3 +481,6 @@ $RECYCLE.BIN/
 
 # Vim temporary swap files
 *.swp
+
+# Cache folders used in disk caching
+Cache/*

About/About.xml

@@ -5,6 +5,7 @@
 	<supportedVersions>
 		<li>1.4</li>
 		<li>1.5</li>
+		<li>1.6</li>
 	</supportedVersions>
 	<author>bradson</author>
 	<modIconPath IgnoreIfNoMatchingField="True">PerformanceFish/ModIcon</modIconPath>

Source/PerformanceFish/1.5.csproj

@@ -3,6 +3,8 @@
 	<PropertyGroup>
 		<OutDir>..\..\1.5\Assemblies\</OutDir>
 		<Copyright>Copyright (c) 2024 Bradson</Copyright>
+		<FisheryRepoRoot Condition="Exists('$(MSBuildThisFileDirectory)..\..\..\Fishery\1.5\Assemblies\1Fishery.dll')">$(MSBuildThisFileDirectory)..\..\..\Fishery</FisheryRepoRoot>
+		<FisheryRepoRoot Condition="'$(FisheryRepoRoot)' == '' and Exists('$(MSBuildThisFileDirectory)..\..\..\Fishery-clean\1.5\Assemblies\1Fishery.dll')">$(MSBuildThisFileDirectory)..\..\..\Fishery-clean</FisheryRepoRoot>
 	</PropertyGroup>
 	<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
 		<DefineConstants>DEBUG;V1_5</DefineConstants>
@@ -14,7 +16,7 @@
 		<PackageReference Include="Krafs.Rimworld.Ref" Version="1.5.*" />
 		<PackageReference Include="Lib.Harmony" Version="2.3.3" ExcludeAssets="runtime" />
 		<Reference Include="1Fishery">
-			<HintPath>..\..\..\Fishery\1.5\Assemblies\1Fishery.dll</HintPath>
+			<HintPath>$(FisheryRepoRoot)\1.5\Assemblies\1Fishery.dll</HintPath>
 			<Private>False</Private>
 		</Reference>
 	</ItemGroup>

Source/PerformanceFish/1.6.csproj

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project Sdk="Microsoft.NET.Sdk">
+	<PropertyGroup>
+		<OutDir>..\..\1.6\Assemblies\</OutDir>
+		<Copyright>Copyright (c) 2026 Bradson</Copyright>
+		<FisheryRepoRoot Condition="Exists('$(MSBuildThisFileDirectory)..\..\..\Fishery\1.6\Assemblies\1Fishery.dll')">$(MSBuildThisFileDirectory)..\..\..\Fishery</FisheryRepoRoot>
+		<FisheryRepoRoot Condition="'$(FisheryRepoRoot)' == '' and Exists('$(MSBuildThisFileDirectory)..\..\..\Fishery-clean\1.6\Assemblies\1Fishery.dll')">$(MSBuildThisFileDirectory)..\..\..\Fishery-clean</FisheryRepoRoot>
+	</PropertyGroup>
+	<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+		<DefineConstants>DEBUG;V1_5;V1_6</DefineConstants>
+	</PropertyGroup>
+	<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+		<DefineConstants>V1_5;V1_6</DefineConstants>
+	</PropertyGroup>
+	<ItemGroup>
+		<PackageReference Include="Krafs.Rimworld.Ref" Version="1.6.*" />
+		<PackageReference Include="Lib.Harmony" Version="2.3.3" ExcludeAssets="runtime" />
+		<Reference Include="1Fishery">
+			<HintPath>$(FisheryRepoRoot)\1.6\Assemblies\1Fishery.dll</HintPath>
+			<Private>False</Private>
+		</Reference>
+	</ItemGroup>
+</Project>

Source/PerformanceFish/Cache/BitCellGrid.cs

@@ -7,13 +7,15 @@ namespace PerformanceFish.Cache;
 
 public sealed class BitCellGrid
 {
+	private readonly Map _map;
 	private long[] _innerArray;
 	private CellIndices _cellIndices;
 
 	public BitCellGrid(Map map)
 	{
-		_innerArray = null!;
-		_cellIndices = null!;
+		_map = map;
+		_innerArray = Array.Empty<long>();
+		_cellIndices = default;
 		map.InvokeWhenCellIndicesReady(Initialize);
 	}
 
@@ -23,12 +25,26 @@ public sealed class BitCellGrid
 		_innerArray = new long[(Math.Max(0, _cellIndices.NumGridCells - 1) >> 6) + 1];
 	}
 
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	private void EnsureInitialized()
+	{
+		if (_cellIndices.NumGridCells != _map.cellIndices.NumGridCells)
+			Initialize(_map);
+	}
+
 	public bool this[int index]
 	{
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		get => (_innerArray[index >> 6] & (1L << (index & 63))) != 0L;
+		get
+		{
+			EnsureInitialized();
+			ValidateIndex(index);
+			return (_innerArray[index >> 6] & (1L << (index & 63))) != 0L;
+		}
 		set
 		{
+			EnsureInitialized();
+			ValidateIndex(index);
 			ref var bucket = ref _innerArray[index >> 6];
 			bucket ^= (-(long)value.AsInt() ^ bucket) & (1L << (index & 63));
 		}
@@ -37,7 +53,24 @@ public sealed class BitCellGrid
 	public bool this[in IntVec3 c]
 	{
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		get => this[c.CellToIndex(_cellIndices)];
-		set => this[c.CellToIndex(_cellIndices)] = value;
+		get
+		{
+			EnsureInitialized();
+			return this[c.CellToIndex(_cellIndices)];
+		}
+		set
+		{
+			EnsureInitialized();
+			this[c.CellToIndex(_cellIndices)] = value;
+		}
+	}
+
+	[MethodImpl(MethodImplOptions.NoInlining)]
+	private void ValidateIndex(int index)
+	{
+		if ((uint)index >= (uint)_cellIndices.NumGridCells)
+		{
+			throw new IndexOutOfRangeException($"BitCellGrid index {index} out of bounds for {_cellIndices.NumGridCells} cells on map size {_map.Size}.");
+		}
 	}
 }

Source/PerformanceFish/Cache/CellGrid.cs

@@ -9,38 +9,60 @@ namespace PerformanceFish.Cache;
 
 public sealed class CellGrid<T>
 {
+	private readonly Map _map;
 	private T[] _innerArray;
 	private CellIndices _cellIndices;
 
 	public CellGrid(Map map)
 	{
-		_innerArray = null!;
-		_cellIndices = null!;
+		_map = map;
+		_innerArray = Array.Empty<T>();
+		_cellIndices = default;
 		map.InvokeWhenCellIndicesReady(Initialize);
 	}
 
-	[MemberNotNull(nameof(_innerArray), nameof(_cellIndices))]
+	[MemberNotNull(nameof(_innerArray))]
 	private void Initialize(Map map)
 	{
 		_cellIndices = map.cellIndices;
 		_innerArray = new T[_cellIndices.NumGridCells];
 	}
 
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	private void EnsureInitialized()
+	{
+		if (_cellIndices.NumGridCells != _map.cellIndices.NumGridCells)
+			Initialize(_map);
+	}
+
 	public ref T this[int index]
 	{
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		get => ref _innerArray[index];
+		get
+		{
+			EnsureInitialized();
+			return ref _innerArray[index];
+		}
 	}
 
 	public ref T this[in IntVec3 c]
 	{
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		get => ref _innerArray[c.CellToIndex(_cellIndices)];
+		get
+		{
+			EnsureInitialized();
+			var index = c.CellToIndex(_cellIndices);
+			return ref _innerArray[index];
+		}
 	}
 
 	public ref T this[CellIndex cellIndex]
 	{
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		get => ref _innerArray[cellIndex.Value];
+		get
+		{
+			EnsureInitialized();
+			return ref _innerArray[cellIndex.Value];
+		}
 	}
 }

Source/PerformanceFish/CellIndex.cs

@@ -10,18 +10,23 @@ public record struct CellIndex(int Value)
 	public int Value = Value;
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
-	public CellIndex(IntVec3 cell, Map map) : this(cell, map.cellIndices.mapSizeX) {}
+	public CellIndex(IntVec3 cell, Map map) : this(cell, map.Size.x) {}
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public CellIndex(IntVec3 cell, int mapSizeX) : this(cell.CellToIndex(mapSizeX)) {}
 
-	public IntVec3 ToCell(Map map) => ToCell(map.cellIndices.mapSizeX);
+	public IntVec3 ToCell(Map map) => ToCell(map.Size.x);
 	
 	public IntVec3 ToCell(int mapSizeX) => CellIndicesUtility.IndexToCell(Value, mapSizeX);
 
 	public List<Thing> GetThingList(Map map) => map.thingGrid.thingGrid[Value];
 
-	public bool IsFogged(Map map) => map.fogGrid.fogGrid[Value];
+	public bool IsFogged(Map map)
+#if V1_6
+		=> map.fogGrid.fogGrid.IsSet(Value);
+#else
+		=> map.fogGrid.fogGrid[Value];
+#endif
 
 	public float GetSnowDepth(Map map) => map.snowGrid.depthGrid[Value];
 

Source/PerformanceFish/CompTickOptimization.cs

@@ -0,0 +1,353 @@
+// Copyright (c) 2026 Bradson
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using PerformanceFish.Prepatching;
+
+namespace PerformanceFish;
+
+public sealed class CompTickOptimization : ClassWithFishPrepatches
+{
+	private static readonly MethodInfo _thingCompTickMethod
+		= AccessTools.DeclaredMethod(typeof(ThingComp), nameof(ThingComp.CompTick));
+
+	private static readonly MethodInfo _thingCompTickIntervalMethod
+		= AccessTools.DeclaredMethod(typeof(ThingComp), nameof(ThingComp.CompTickInterval), [typeof(int)]);
+
+	private static readonly MethodInfo _thingCompTickRareMethod
+		= AccessTools.DeclaredMethod(typeof(ThingComp), nameof(ThingComp.CompTickRare));
+
+	private static readonly MethodInfo _thingCompTickLongMethod
+		= AccessTools.DeclaredMethod(typeof(ThingComp), nameof(ThingComp.CompTickLong));
+
+	private static readonly MethodInfo _hediffCompPostTickMethod
+		= AccessTools.DeclaredMethod(typeof(HediffComp), nameof(HediffComp.CompPostTick), [typeof(float).MakeByRefType()]);
+
+	private static readonly MethodInfo _hediffCompPostTickIntervalMethod = AccessTools.DeclaredMethod(
+		typeof(HediffComp),
+		nameof(HediffComp.CompPostTickInterval),
+		[typeof(float).MakeByRefType(), typeof(int)]);
+
+	private static readonly bool _thingCompTickBaseIsTrivial = IsTrivialVoidMethod(_thingCompTickMethod);
+	private static readonly bool _thingCompTickIntervalBaseIsTrivial = IsTrivialVoidMethod(_thingCompTickIntervalMethod);
+	private static readonly bool _thingCompTickRareBaseIsTrivial = IsTrivialVoidMethod(_thingCompTickRareMethod);
+	private static readonly bool _thingCompTickLongBaseIsTrivial = IsTrivialVoidMethod(_thingCompTickLongMethod);
+	private static readonly bool _hediffCompPostTickBaseIsTrivial = IsTrivialVoidMethod(_hediffCompPostTickMethod);
+	private static readonly bool _hediffCompPostTickIntervalBaseIsTrivial
+		= IsTrivialVoidMethod(_hediffCompPostTickIntervalMethod);
+
+	private static readonly Lazy<bool> _canSkipInheritedBaseThingCompTick
+		= new(static () => _thingCompTickBaseIsTrivial && !HasHarmonyPatches(_thingCompTickMethod));
+
+	private static readonly Lazy<bool> _canSkipInheritedBaseThingCompTickInterval
+		= new(static () => _thingCompTickIntervalBaseIsTrivial && !HasHarmonyPatches(_thingCompTickIntervalMethod));
+
+	private static readonly Lazy<bool> _canSkipInheritedBaseThingCompTickRare
+		= new(static () => _thingCompTickRareBaseIsTrivial && !HasHarmonyPatches(_thingCompTickRareMethod));
+
+	private static readonly Lazy<bool> _canSkipInheritedBaseThingCompTickLong
+		= new(static () => _thingCompTickLongBaseIsTrivial && !HasHarmonyPatches(_thingCompTickLongMethod));
+
+	private static readonly Lazy<bool> _canSkipInheritedBaseHediffCompPostTick
+		= new(static () => _hediffCompPostTickBaseIsTrivial && !HasHarmonyPatches(_hediffCompPostTickMethod));
+
+	private static readonly Lazy<bool> _canSkipInheritedBaseHediffCompPostTickInterval = new(
+		static () => _hediffCompPostTickIntervalBaseIsTrivial && !HasHarmonyPatches(_hediffCompPostTickIntervalMethod));
+
+	private static readonly FishTable<Type, bool> _thingCompTickTypes = new()
+	{
+		ValueInitializer = static type => InheritsThingCompTick(type)
+	};
+
+	private static readonly FishTable<Type, bool> _thingCompTickIntervalTypes = new()
+	{
+		ValueInitializer = static type => InheritsThingCompTickInterval(type)
+	};
+
+	private static readonly FishTable<Type, bool> _thingCompTickRareTypes = new()
+	{
+		ValueInitializer = static type => InheritsThingCompTickRare(type)
+	};
+
+	private static readonly FishTable<Type, bool> _thingCompTickLongTypes = new()
+	{
+		ValueInitializer = static type => InheritsThingCompTickLong(type)
+	};
+
+	private static readonly FishTable<Type, bool> _hediffCompPostTickTypes = new()
+	{
+		ValueInitializer = static type => InheritsHediffCompPostTick(type)
+	};
+
+	private static readonly FishTable<Type, bool> _hediffCompPostTickIntervalTypes = new()
+	{
+		ValueInitializer = static type => InheritsHediffCompPostTickInterval(type)
+	};
+
+	public sealed class ThingTickPatch : FishPrepatch
+	{
+		public override bool DefaultState => false;
+
+		public override string? Description { get; }
+			= "Skips inherited empty ThingComp.CompTick calls when the base method is still unpatched and trivial.";
+
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredMethod(typeof(ThingWithComps), "Tick");
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
+
+		public static void ReplacementBody(ThingWithComps instance)
+		{
+			var comps = instance.AllComps;
+			var count = comps.Count;
+			var canSkipInheritedBase = CanSkipInheritedBaseThingCompTick();
+			for (var i = 0; i < count; i++)
+			{
+				var comp = comps[i];
+				if (!canSkipInheritedBase || !_thingCompTickTypes.GetOrAdd(comp.GetType()))
+					comp.CompTick();
+			}
+		}
+	}
+
+	public sealed class ThingTickIntervalPatch : FishPrepatch
+	{
+		public override bool DefaultState => false;
+
+		public override string? Description { get; }
+			= "Skips inherited empty ThingComp.CompTickInterval calls when the base method is still unpatched and trivial.";
+
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredMethod(typeof(ThingWithComps), "TickInterval", [typeof(int)]);
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
+
+		public static void ReplacementBody(ThingWithComps instance, int delta)
+		{
+			var comps = instance.AllComps;
+			var count = comps.Count;
+			var canSkipInheritedBase = CanSkipInheritedBaseThingCompTickInterval();
+			for (var i = 0; i < count; i++)
+			{
+				var comp = comps[i];
+				if (!canSkipInheritedBase || !_thingCompTickIntervalTypes.GetOrAdd(comp.GetType()))
+					comp.CompTickInterval(delta);
+			}
+		}
+	}
+
+	public sealed class ThingTickRarePatch : FishPrepatch
+	{
+		public override bool DefaultState => false;
+
+		public override string? Description { get; }
+			= "Skips inherited empty ThingComp.CompTickRare calls when the base method is still unpatched and trivial.";
+
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredMethod(typeof(ThingWithComps), nameof(ThingWithComps.TickRare));
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
+
+		public static void ReplacementBody(ThingWithComps instance)
+		{
+			var comps = instance.AllComps;
+			var count = comps.Count;
+			var canSkipInheritedBase = CanSkipInheritedBaseThingCompTickRare();
+			for (var i = 0; i < count; i++)
+			{
+				var comp = comps[i];
+				if (!canSkipInheritedBase || !_thingCompTickRareTypes.GetOrAdd(comp.GetType()))
+					comp.CompTickRare();
+			}
+		}
+	}
+
+	public sealed class ThingTickLongPatch : FishPrepatch
+	{
+		public override bool DefaultState => false;
+
+		public override string? Description { get; }
+			= "Skips inherited empty ThingComp.CompTickLong calls when the base method is still unpatched and trivial.";
+
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredMethod(typeof(ThingWithComps), nameof(ThingWithComps.TickLong));
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
+
+		public static void ReplacementBody(ThingWithComps instance)
+		{
+			var comps = instance.AllComps;
+			var count = comps.Count;
+			var canSkipInheritedBase = CanSkipInheritedBaseThingCompTickLong();
+			for (var i = 0; i < count; i++)
+			{
+				var comp = comps[i];
+				if (!canSkipInheritedBase || !_thingCompTickLongTypes.GetOrAdd(comp.GetType()))
+					comp.CompTickLong();
+			}
+		}
+	}
+
+	public sealed class HediffPostTickPatch : FishPrepatch
+	{
+		public override bool DefaultState => false;
+
+		public override string? Description { get; }
+			= "Skips inherited empty HediffComp.CompPostTick calls when the base method is still unpatched and trivial.";
+
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredMethod(typeof(HediffWithComps), nameof(HediffWithComps.PostTick));
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
+
+		public static void ReplacementBody(HediffWithComps instance)
+		{
+			var comps = instance.comps;
+			if (comps == null)
+				return;
+
+			var count = comps.Count;
+			var severityAdjustment = 0f;
+			var canSkipInheritedBase = CanSkipInheritedBaseHediffCompPostTick();
+
+			for (var i = 0; i < count; i++)
+			{
+				var comp = comps[i];
+				if (!canSkipInheritedBase || !_hediffCompPostTickTypes.GetOrAdd(comp.GetType()))
+					comp.CompPostTick(ref severityAdjustment);
+			}
+
+			if (severityAdjustment != 0f)
+				instance.Severity += severityAdjustment;
+		}
+	}
+
+	public sealed class HediffPostTickIntervalPatch : FishPrepatch
+	{
+		public override bool DefaultState => false;
+
+		public override string? Description { get; }
+			= "Skips inherited empty HediffComp.CompPostTickInterval calls when the base method is still unpatched and trivial.";
+
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredMethod(typeof(HediffWithComps), nameof(HediffWithComps.PostTickInterval), [typeof(int)]);
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
+
+		public static void ReplacementBody(HediffWithComps instance, int delta)
+		{
+			var comps = instance.comps;
+			if (comps == null)
+				return;
+
+			var count = comps.Count;
+			var severityAdjustment = 0f;
+			var canSkipInheritedBase = CanSkipInheritedBaseHediffCompPostTickInterval();
+
+			for (var i = 0; i < count; i++)
+			{
+				var comp = comps[i];
+				if (!canSkipInheritedBase || !_hediffCompPostTickIntervalTypes.GetOrAdd(comp.GetType()))
+					comp.CompPostTickInterval(ref severityAdjustment, delta);
+			}
+
+			if (severityAdjustment != 0f)
+				instance.Severity += severityAdjustment;
+		}
+	}
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	private static bool CanSkipInheritedBaseThingCompTick()
+		=> _canSkipInheritedBaseThingCompTick.Value;
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	private static bool CanSkipInheritedBaseThingCompTickInterval()
+		=> _canSkipInheritedBaseThingCompTickInterval.Value;
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	private static bool CanSkipInheritedBaseThingCompTickRare()
+		=> _canSkipInheritedBaseThingCompTickRare.Value;
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	private static bool CanSkipInheritedBaseThingCompTickLong()
+		=> _canSkipInheritedBaseThingCompTickLong.Value;
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	private static bool CanSkipInheritedBaseHediffCompPostTick()
+		=> _canSkipInheritedBaseHediffCompPostTick.Value;
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	private static bool CanSkipInheritedBaseHediffCompPostTickInterval()
+		=> _canSkipInheritedBaseHediffCompPostTickInterval.Value;
+
+	private static bool InheritsThingCompTick(Type type)
+		=> AccessTools.Method(type, nameof(ThingComp.CompTick))?.DeclaringType == typeof(ThingComp);
+
+	private static bool InheritsThingCompTickInterval(Type type)
+		=> AccessTools.Method(type, nameof(ThingComp.CompTickInterval), [typeof(int)])?.DeclaringType == typeof(ThingComp);
+
+	private static bool InheritsThingCompTickRare(Type type)
+		=> AccessTools.Method(type, nameof(ThingComp.CompTickRare))?.DeclaringType == typeof(ThingComp);
+
+	private static bool InheritsThingCompTickLong(Type type)
+		=> AccessTools.Method(type, nameof(ThingComp.CompTickLong))?.DeclaringType == typeof(ThingComp);
+
+	private static bool InheritsHediffCompPostTick(Type type)
+		=> AccessTools.Method(type, nameof(HediffComp.CompPostTick), [typeof(float).MakeByRefType()])?.DeclaringType
+			== typeof(HediffComp);
+
+	private static bool InheritsHediffCompPostTickInterval(Type type)
+		=> AccessTools.Method(type, nameof(HediffComp.CompPostTickInterval),
+				[typeof(float).MakeByRefType(), typeof(int)])?.DeclaringType
+			== typeof(HediffComp);
+
+	private static bool IsTrivialVoidMethod(MethodInfo method)
+	{
+		if (method.ReturnType != typeof(void)
+			|| method.GetMethodBody() is not { ExceptionHandlingClauses.Count: 0, LocalVariables.Count: 0 } body)
+		{
+			return false;
+		}
+
+		var il = body.GetILAsByteArray();
+		if (il == null || il.Length == 0)
+			return false;
+
+		var sawRet = false;
+
+		for (var i = 0; i < il.Length; i++)
+		{
+			switch (il[i])
+			{
+				case 0x00:
+					continue;
+				case 0x2A when i == il.Length - 1 && !sawRet:
+					sawRet = true;
+					continue;
+				default:
+					return false;
+			}
+		}
+
+		return sawRet;
+	}
+
+	private static bool HasHarmonyPatches(MethodBase method)
+	{
+		var patches = Harmony.GetPatchInfo(method);
+		return patches is not null
+			&& (patches.Prefixes.Count != 0
+				|| patches.Postfixes.Count != 0
+				|| patches.Transpilers.Count != 0
+				|| patches.Finalizers.Count != 0);
+	}
+}

Source/PerformanceFish/Defs/RecipeDefCaching.cs

@@ -56,8 +56,8 @@ public sealed class RecipeDefCaching : ClassWithFishPatches
 		{
 			private int _defDatabaseVersion = -2;
 			private int _defRecipeUsersVersion = -2;
-			private RecipeDef _def;
-			public List<ThingDef> RecipeUsers;
+			private RecipeDef? _def;
+			public List<ThingDef> RecipeUsers = [];
 
 			public void Update(RecipeDef instance, IEnumerable<ThingDef> result)
 			{
@@ -81,7 +81,7 @@ public sealed class RecipeDefCaching : ClassWithFishPatches
 				[MethodImpl(MethodImplOptions.AggressiveInlining)]
 				get
 					=> _defDatabaseVersion != DefDatabase<ThingDef>.defsList._version
-						|| _defRecipeUsersVersion != (_def.recipeUsers?._version ?? 0);
+						|| _defRecipeUsersVersion != (_def?.recipeUsers?._version ?? 0);
 			}
 		}
 	}

Source/PerformanceFish/Defs/ThingDefPatches.cs

@@ -21,13 +21,25 @@ public sealed class ThingDefPatches : ClassWithFishPrepatches
 	public sealed class GetHashCodePatch : FishClassPrepatch
 	{
 		public override string? Description { get; }
+#if V1_6
+			= "Disabled on 1.6 because Verse.Def now already caches defNameHash and overrides GetHashCode itself.";
+#else
 			= "Def.GetHashCode is overridden to return defName.GetHashCode, which is rather slow as that's a string. "
 			+ "This patch caches the hashcode in a field added through prepatcher and simply returns that instead.";
+#endif
 
-		public override Type Type { get; } = typeof(BuildableDef);
+		public override Type Type { get; } =
+#if V1_6
+			typeof(Def);
+#else
+			typeof(BuildableDef);
+#endif
 
 		public override void FreePatch(TypeDefinition typeDefinition)
 		{
+#if V1_6
+			return;
+#else
 			var module = typeDefinition.Module;
 
 			var fishHashField = new FieldDefinition(FISH_HASH_FIELD_NAME, FieldAttributes.Private,
@@ -74,6 +86,7 @@ public sealed class ThingDefPatches : ClassWithFishPrepatches
 			getHashCodeBody.MaxStackSize = 2;
 			getHashCodeBody.Method.ImplAttributes |= MethodImplAttributes.AggressiveInlining;
 			getHashCodeBody.OptimizeMacros();
+#endif
 		}
 
 		// [MethodImpl(MethodImplOptions.AggressiveInlining)]

Source/PerformanceFish/Directory.Build.props

@@ -29,12 +29,13 @@
 	<ItemGroup>
 		<PackageReference Include="Zetrith.Prepatcher" Version="1.*" ExcludeAssets="runtime" />
 		<PackageReference Include="PolySharp" Version="1.*" />
-		<PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.0.*" ExcludeAssets="runtime" />
+		<PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.1.2" ExcludeAssets="runtime" />
 		<PackageReference Include="JetBrains.Annotations" Version="2023.*" Aliases="nuget" ExcludeAssets="runtime" />
 		<PackageReference Include="Krafs.Publicizer" Version="2.*" />
 		
 		<Publicize Include="Assembly-CSharp;0Harmony" IncludeVirtualMembers="false" />
 		<Publicize Include="Assembly-CSharp:RimWorld.JobGiver_Haul.TryGiveJob" />
+		<Publicize Include="Assembly-CSharp:RimWorld.CompRottable.TickInterval" />
 		<!-- DoNotPublicize Include="0Harmony:Mono.Collections.Generic.Collection`1" / -->
 		<DoNotPublicize Include="0Harmony:System.Memory`1" />
 		<DoNotPublicize Include="0Harmony:System.ReadOnlyMemory`1" />

Source/PerformanceFish/GasGridOptimization.cs

@@ -41,7 +41,8 @@ public sealed class GasGridOptimization : ClassWithFishPrepatches
 			= "Required by the gas grid optimization";
 
 		public override MethodBase TargetMethodBase { get; }
-			= AccessTools.DeclaredMethod(typeof(GasGrid), nameof(GasGrid.SetDirect));
+			= AccessTools.DeclaredMethod(typeof(GasGrid), nameof(GasGrid.SetDirect),
+				[typeof(int), typeof(byte), typeof(byte), typeof(byte), typeof(byte)])!;
 
 		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
 			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
@@ -415,7 +416,7 @@ public sealed class GasGridOptimization : ClassWithFishPrepatches
 		}
 
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		public static int GetMapSizeX(Map map) => map.cellIndices.mapSizeX;
+		public static int GetMapSizeX(Map map) => map.Size.x;
 	}
 
 	public sealed class ExposeDataPatch : FishPrepatch
@@ -1075,7 +1076,7 @@ public sealed class GasGridOptimization : ClassWithFishPrepatches
 
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
 		private IntVec3 IndexToCell(int index)
-			=> CellIndicesUtility.IndexToCell(index, Map.cellIndices.mapSizeX);
+			=> CellIndicesUtility.IndexToCell(index, Map.Size.x);
 
 		/// <summary>
 		/// For modders. Performance Fish doesn't automatically scribe added custom defs.

Source/PerformanceFish/GenLocalDateCaching.cs

@@ -19,45 +19,17 @@ public sealed class GenLocalDateCaching : ClassWithFishPatches
 			+ "optimization, but yields accurate results instead of a placeholder value to avoid issues";
 
 		public override Delegate TargetMethodGroup { get; } = (Func<Thing, int>)GenLocalDate.DayTick;
-		public override int TranspilerMethodPriority => Priority.First;
+		public override int PrefixMethodPriority => Priority.First;
 
-		public static CodeInstructions Transpiler(CodeInstructions codes, MethodBase method, ILGenerator generator)
-			//=> Reflection.GetCodeInstructions(Replacement);
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static bool Prefix(Thing thing, ref int __result)
 		{
-			var labelToStartOfMethod = generator.DefineLabel();
-			codes.First().labels.Add(labelToStartOfMethod);
+			if (thing.TryGetMap() is not { } map)
+				return true;
 
-			yield return FishTranspiler.Argument(method, "thing");
-			yield return FishTranspiler.Field(typeof(Thing), nameof(Thing.mapIndexOrState));
-			yield return FishTranspiler.Constant(0);
-			yield return FishTranspiler.IfLessThan(labelToStartOfMethod);
-
-			yield return FishTranspiler.Field(typeof(Current), nameof(Current.gameInt));
-			yield return FishTranspiler.Field(typeof(Game), nameof(Game.maps));
-			yield return FishTranspiler.Argument(method, "thing");
-			yield return FishTranspiler.Field(typeof(Thing), nameof(Thing.mapIndexOrState));
-			yield return FishTranspiler.Call(typeof(List<Map>), "get_Item");
-			yield return FishTranspiler.Call<Func<Map, int>>(GenLocalDate.DayTick);
-			yield return FishTranspiler.Return;
-
-			foreach (var code in codes)
-				yield return code;
+			__result = GenLocalDate.DayTick(map);
+			return false;
 		}
-
-		//[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		//public static int Replacement(Thing thing)
-		//	=> thing.mapIndexOrState < 0 ? GenDate.DayTick(GenTicks.TicksAbs, GenLocalDate.LongitudeForDate(thing))
-		//	: GenLocalDate.DayTick(Current.gameInt.maps[thing.mapIndexOrState]);
-
-		//[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		//public static bool Prefix(Thing thing, ref int __result)
-		//{
-		//	if (thing.mapIndexOrState < 0)
-		//		return true;
-
-		//	__result = GenLocalDate.DayTick(Current.gameInt.maps[thing.mapIndexOrState]);
-		//	return false;
-		//}
 	}
 
 	public sealed class DayTickByMap_Patch : FishPatch
@@ -79,7 +51,7 @@ public sealed class GenLocalDateCaching : ClassWithFishPatches
 				return __state = true;
 			}
 
-			if (SavedTick != TickHelper.TicksGame)
+			if (SavedDayTickTick != TickHelper.TicksGame)
 				return __state = true;
 
 			__result = DayTick;
@@ -92,12 +64,88 @@ public sealed class GenLocalDateCaching : ClassWithFishPatches
 			if (!__state || SavedMap != map)
 				return;
 
-			SavedTick = TickHelper.TicksGame;
+			SavedDayTickTick = TickHelper.TicksGame;
 			DayTick = __result;
 		}
 	}
 
+	public sealed class HourIntegerByMap_Patch : FishPatch
+	{
+		public override string Description { get; }
+			= "Caches results of GenLocalDate.HourInteger for the first map.";
+
+		public override Delegate TargetMethodGroup { get; } = (Func<Map, int>)GenLocalDate.HourInteger;
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static bool Prefix(Map map, ref int __result, out bool __state)
+		{
+			if (map != SavedMap)
+			{
+				if (SavedMap is null && Find.Maps is { Count: > 0 } maps && maps[0] == map)
+					SavedMap = map;
+
+				return __state = true;
+			}
+
+			if (SavedHourIntegerTick != TickHelper.TicksGame)
+				return __state = true;
+
+			__result = HourInteger;
+			return __state = false;
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static void Postfix(Map map, int __result, bool __state)
+		{
+			if (!__state || SavedMap != map)
+				return;
+
+			SavedHourIntegerTick = TickHelper.TicksGame;
+			HourInteger = __result;
+		}
+	}
+
+	public sealed class SeasonByMap_Patch : FishPatch
+	{
+		public override string Description { get; }
+			= "Caches results of GenLocalDate.Season for the first map.";
+
+		public override Delegate TargetMethodGroup { get; } = (Func<Map, Season>)GenLocalDate.Season;
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static bool Prefix(Map map, ref Season __result, out bool __state)
+		{
+			if (map != SavedMap)
+			{
+				if (SavedMap is null && Find.Maps is { Count: > 0 } maps && maps[0] == map)
+					SavedMap = map;
+
+				return __state = true;
+			}
+
+			if (SavedSeasonTick != TickHelper.TicksGame)
+				return __state = true;
+
+			__result = Season;
+			return __state = false;
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static void Postfix(Map map, Season __result, bool __state)
+		{
+			if (!__state || SavedMap != map)
+				return;
+
+			SavedSeasonTick = TickHelper.TicksGame;
+			Season = __result;
+		}
+	}
+
 	public static Map? SavedMap;
-	public static int SavedTick = -2;
+	public static int SavedDayTickTick = -2;
+	public static int SavedHourIntegerTick = -2;
+	public static int SavedSeasonTick = -2;
 	public static int DayTick = -2;
+	public static int HourInteger = -2;
+	public static Season Season = Season.Undefined;
 }

Source/PerformanceFish/GenTypesPatches.cs

@@ -43,14 +43,15 @@ public sealed class GenTypesPatches : ClassWithFishPrepatches
 
 		public static List<Type> ReplacementBody<TAttr>() where TAttr : Attribute
 		{
+			var attributeType = typeof(TAttr);
 			lock (Lock)
 			{
-				var typesWithAttribute = GenTypes.cachedTypesWithAttribute.TryGetValue(typeof(TAttr));
+				var typesWithAttribute = GenTypes.cachedTypesWithAttribute.TryGetValue(attributeType);
 
 				if (typesWithAttribute is null)
 				{
-					GenTypes.cachedTypesWithAttribute.Add(typeof(TAttr),
-						typesWithAttribute = GenTypes.AllTypes.AsParallel()
+					GenTypes.cachedTypesWithAttribute.Add(attributeType,
+						typesWithAttribute = GenTypes.AllTypes
 							.Where(Predicate<TAttr>()).ToList());
 				}
 			
@@ -82,23 +83,14 @@ public sealed class GenTypesPatches : ClassWithFishPrepatches
 
 				if (subclasses is null)
 				{
-					((PredicateClass)Predicate.Target).BaseType = baseType;
 					GenTypes.cachedSubclasses.Add(baseType,
-						subclasses = GenTypes.AllTypes.AsParallel()
-							.Where(Predicate).ToList());
+						subclasses = GenTypes.AllTypes
+							.Where(type => type.IsSubclassOf(baseType)).ToList());
 				}
 			
 				return subclasses;
 			}
 		}
-
-		public static Func<Type, bool> Predicate = new PredicateClass().Invoke;
-
-		public sealed class PredicateClass
-		{
-			public Type? BaseType;
-			public bool Invoke(Type type) => type.IsSubclassOf(BaseType!);
-		}
 	}
 
 	public sealed class AllSubclassesNonAbstract : FishPrepatch
@@ -123,7 +115,7 @@ public sealed class GenTypesPatches : ClassWithFishPrepatches
 				if (subclassesNonAbstract is null)
 				{
 					GenTypes.cachedSubclassesNonAbstract.Add(baseType,
-						subclassesNonAbstract = baseType.AllSubclasses().AsParallel()
+						subclassesNonAbstract = baseType.AllSubclasses()
 							.Where(Predicate).ToList());
 				}
 			

Source/PerformanceFish/GeneTrackerOptimization.cs

@@ -14,6 +14,16 @@ public sealed class GeneTrackerOptimization : ClassWithFishPrepatches
 {
 	public sealed class GeneTrackerTickPatch : FishPrepatch
 	{
+		private static readonly FishTable<Type, bool> _skippableTypes;
+
+		static GeneTrackerTickPatch()
+		{
+			_skippableTypes = new()
+			{
+				ValueInitializer = static type => ComputeIsSkippableType(type)
+			};
+		}
+
 		public override string? Description { get; }
 			= "Every pawn has a gene tracker, which is responsible for ticking each of their genes. Normally it ticks "
 			+ "all of them equally, including those don't change or affect anything through ticking, like skin colors "
@@ -74,7 +84,7 @@ public sealed class GeneTrackerOptimization : ClassWithFishPrepatches
 			for (var i = 0; i < count; i++)
 			{
 				var gene = genes[i];
-				if (SkippableTypes.Contains(gene.GetType())
+				if (IsSkippableType(gene.GetType())
 					&& (gene.def.mentalBreakMtbDays <= 0f || gene.def.mentalBreakDef == null))
 				{
 					continue;
@@ -84,7 +94,63 @@ public sealed class GeneTrackerOptimization : ClassWithFishPrepatches
 			}
 		}
 
-		public static HashSet<Type> SkippableTypes
-			= typeof(Gene).SubclassesWithNoMethodOverrideAndSelf(nameof(Gene.Tick)).ToHashSet();
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		private static bool IsSkippableType(Type type) => _skippableTypes.GetOrAdd(type);
+
+		private static bool ComputeIsSkippableType(Type type)
+		{
+			if (type == typeof(Gene))
+				return true;
+
+			var tickMethod = type.GetMethod(nameof(Gene.Tick), global::System.Reflection.BindingFlags.Instance
+				| global::System.Reflection.BindingFlags.Public
+				| global::System.Reflection.BindingFlags.NonPublic, null, Type.EmptyTypes, null);
+			var tickIntervalMethod = type.GetMethod(nameof(Gene.TickInterval),
+				global::System.Reflection.BindingFlags.Instance
+				| global::System.Reflection.BindingFlags.Public
+				| global::System.Reflection.BindingFlags.NonPublic, null, [typeof(int)], null);
+
+			return tickMethod?.DeclaringType == typeof(Gene)
+				&& tickIntervalMethod?.DeclaringType == typeof(Gene);
+		}
+	}
+
+	public sealed class GeneTrackerTickIntervalPatch : FishPrepatch
+	{
+		// i am iffy about this
+		public override string? Description { get; }
+			= "Every pawn has a gene tracker, which is responsible for ticking each of their genes. Normally it ticks "
+			+ "all of them equally, including those don't change or affect anything through ticking, like skin colors "
+			+ "or basic stat modifiers. This patch improves the gene tracker to determine genes that need ticking in "
+			+ "advance, cache the list of them, and only tick those, skipping all the others.";
+
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.Method(typeof(Pawn_GeneTracker), nameof(Pawn_GeneTracker.GeneTrackerTickInterval));
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(GeneTrackerTickInterval);
+
+		public static void GeneTrackerTickInterval(Pawn_GeneTracker instance, int delta)
+		{
+			if (!ModLister.BiotechInstalled)
+				return;
+
+			var genesToTick = instance.GenesToTick();
+			if (GeneTrackerTickPatch.Dirty(instance, genesToTick))
+				GeneTrackerTickPatch.Update(instance, genesToTick);
+
+			for (var i = genesToTick.Count - 1; i >= 0; i--)
+			{
+				if (genesToTick[i].Active)
+					genesToTick[i].TickInterval(delta);
+			}
+
+			if (instance.pawn.IsSpawned()
+				&& instance.Xenotype != XenotypeDefOf.Baseliner
+				&& instance.pawn.IsHashIntervalTick(300, delta))
+			{
+				LessonAutoActivator.TeachOpportunity(ConceptDefOf.GenesAndXenotypes, OpportunityType.Important);
+			}
+		}
 	}
 }

Source/PerformanceFish/GlobalUsings.cs

@@ -0,0 +1 @@
+global using HashCode = FisheryLib.HashCode;

Source/PerformanceFish/Hauling/LwmCompCacheValue.cs

@@ -3,7 +3,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
-global using LwmCompCache = PerformanceFish.Cache.ByReference<Verse.Thing, PerformanceFish.Hauling.LwmCompCacheValue>;
+global using LwmCompCache = PerformanceFish.Cache.ByReference<Verse.ThingDef, PerformanceFish.Hauling.LwmCompCacheValue>;
 
 namespace PerformanceFish.Hauling;
 
@@ -11,9 +11,9 @@ public record struct LwmCompCacheValue
 {
 	public CompProperties? CompProperties;
 
-	public static CompProperties? TryGetLwmProps(Thing slotGroupParent)
+	public static CompProperties? TryGetLwmProps(ThingDef thingDef)
 		=> ModCompatibility.Types.LWM.CompProperties != null
-			? slotGroupParent.def.comps?.Find(static props
+			? thingDef.comps?.Find(static props
 				=> props.GetType() == ModCompatibility.Types.LWM.CompProperties)
 			: null;
 

Source/PerformanceFish/Hauling/RimfactoryExtensionCacheValue.cs

@@ -4,7 +4,7 @@
 // file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 global using RimfactoryExtensionCache
-	= PerformanceFish.Cache.ByReference<Verse.Thing, PerformanceFish.Hauling.RimfactoryExtensionCacheValue>;
+	= PerformanceFish.Cache.ByReference<Verse.ThingDef, PerformanceFish.Hauling.RimfactoryExtensionCacheValue>;
 using RimfactoryTypes = PerformanceFish.ModCompatibility.Types.Rimfactory;
 
 namespace PerformanceFish.Hauling;
@@ -13,17 +13,17 @@ public record struct RimfactoryExtensionCacheValue
 {
 	public DefModExtension? ModExtension;
 
-	public static DefModExtension? TryGetExtension(Thing slotGroupParent)
+	public static DefModExtension? TryGetExtension(ThingDef thingDef)
 		=> RimfactoryTypes.ModExtension != null
-			? slotGroupParent.def.modExtensions?.Find(_extensionPredicate)
+			? thingDef.modExtensions?.Find(_extensionPredicate)
 			: null;
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
-	public static bool HasExtension(Thing slotGroupParent)
-		=> RimfactoryTypes.ModExtension != null && TestExtension(slotGroupParent);
+	public static bool HasExtension(Thing thing)
+		=> RimfactoryTypes.ModExtension != null && TestExtension(thing.def);
 
 	[MethodImpl(MethodImplOptions.NoInlining)]
-	private static bool TestExtension(Thing slotGroupParent) => slotGroupParent.TryGetRimfactoryExtension() != null;
+	private static bool TestExtension(ThingDef thingDef) => TryGetExtension(thingDef) != null;
 
 	static RimfactoryExtensionCacheValue() => EnsureInitialized();
 

Source/PerformanceFish/Hauling/StorageExtensions.cs

@@ -24,11 +24,11 @@ public static class StorageExtensions
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static CompProperties? TryGetLwmCompProperties(this Thing thing)
-		=> LwmCompCache.GetOrAdd(thing).CompProperties;
+		=> LwmCompCache.GetOrAdd(thing.def).CompProperties;
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static DefModExtension? TryGetRimfactoryExtension(this Thing thing)
-		=> RimfactoryExtensionCache.GetOrAdd(thing).ModExtension;
+		=> RimfactoryExtensionCache.GetOrAdd(thing.def).ModExtension;
 
 	public static int GetTotalSlots(this SlotGroup slotGroup) => slotGroup.GetTotalSlots(slotGroup.CellsList.Count);
 	

Source/PerformanceFish/JobSystem/JobGiver_HaulOptimization.cs

@@ -3,6 +3,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
+using System.Linq;
 using PerformanceFish.ModCompatibility;
 
 namespace PerformanceFish.JobSystem;
@@ -41,11 +42,19 @@ public sealed class JobGiver_HaulOptimization : ClassWithFishPatches
 			}
 		}
 
-		public static List<Thing> SortedThingsPotentiallyNeedingHauling(List<Thing> things, Pawn pawn)
+		public static ICollection<Thing> SortedThingsPotentiallyNeedingHauling(ICollection<Thing> things, Pawn pawn)
 		{
 			((ThingPositionComparer)_comparer.Target).rootCell = pawn.Position;
-			things.Sort(_comparer);
-			return things;
+
+			if (things is List<Thing> list)
+			{
+				list.Sort(_comparer);
+				return list;
+			}
+
+			var sortedThings = things.ToList();
+			sortedThings.Sort(_comparer);
+			return sortedThings;
 		}
 
 		private static Comparison<Thing> _comparer = new ThingPositionComparer().Compare;

Source/PerformanceFish/Listers/Buildings.cs

@@ -6,6 +6,7 @@
 using Mono.Cecil;
 using Mono.Cecil.Cil;
 using PerformanceFish.Prepatching;
+using PerformanceFish.Utility;
 
 namespace PerformanceFish.Listers;
 
@@ -40,7 +41,21 @@ public sealed class Buildings : ClassWithFishPrepatches
 			=> ilProcessor.ReplaceBodyWith(ReplacementBody<Building>);
 
 		public static IEnumerable<T> ReplacementBody<T>(ListerBuildings __instance)
-			=> (IEnumerable<T>)__instance.Cache().ColonistBuildingsByType.GetOrAdd(typeof(T));
+			=> typeof(Building).IsAssignableFrom(typeof(T))
+				? (IEnumerable<T>)__instance.Cache().ColonistBuildingsByType.GetOrAdd(typeof(T))
+				: FallbackLoop<T>(__instance);
+
+		[MethodImpl(MethodImplOptions.NoInlining)]
+		private static IEnumerable<T> FallbackLoop<T>(ListerBuildings __instance)
+		{
+			var allBuildingsColonist = __instance.allBuildingsColonist;
+
+			for (var i = 0; i < allBuildingsColonist.Count; i++)
+			{
+				if (allBuildingsColonist[i] is T val)
+					yield return val;
+			}
+		}
 	}
 #endif
 	
@@ -237,11 +252,17 @@ public sealed class Buildings : ClassWithFishPrepatches
 			if (def.building is { isNaturalRock: true })
 				return;
 
+			UpdateCacheOnAdd(__instance, b, def);
+		}
+
+		private static void UpdateCacheOnAdd(ListerBuildings __instance, Building b, ThingDef def)
+		{
 			var cache = __instance.Cache();
 
 			if (b.Faction == Faction.OfPlayer)
 			{
-				cache.ColonistBuildingsByDef.GetOrAdd(def).Add(b);
+				if (!cache.ColonistBuildingsByDef.GetOrAdd(def).TryAdd(b))
+					return;
 				if (b is Building_ResearchBench researchBench)
 					cache.ColonistResearchBenches.Add(researchBench);
 				
@@ -250,18 +271,18 @@ public sealed class Buildings : ClassWithFishPrepatches
 				
 				var buildingType = b.GetType();
 
-				do
+				while (buildingType != null && typeof(Building).IsAssignableFrom(buildingType))
 				{
-					if (buildingType == null)
+					cache.ColonistBuildingsByType.GetOrAdd(buildingType).Add(b);
+					if (buildingType == typeof(Building))
 						break;
 
-					cache.ColonistBuildingsByType.GetOrAdd(buildingType).Add(b);
+					buildingType = buildingType.BaseType;
 				}
-				while ((buildingType = buildingType.BaseType) != typeof(Building));
 			}
 			else
 			{
-				cache.NonColonistBuildingsByDef.GetOrAdd(def).Add(b);
+				cache.NonColonistBuildingsByDef.GetOrAdd(def).TryAdd(b);
 			}
 		}
 	}
@@ -290,6 +311,11 @@ public sealed class Buildings : ClassWithFishPrepatches
 			if (def.building is { isNaturalRock: true })
 				return;
 
+			UpdateCacheOnRemove(__instance, b, def);
+		}
+
+		private static void UpdateCacheOnRemove(ListerBuildings __instance, Building b, ThingDef def)
+		{
 			var cache = __instance.Cache();
 			
 			if (b.Faction == Faction.OfPlayer)
@@ -302,14 +328,14 @@ public sealed class Buildings : ClassWithFishPrepatches
 
 				var buildingType = b.GetType();
 
-				do
+				while (buildingType != null && typeof(Building).IsAssignableFrom(buildingType))
 				{
-					if (buildingType == null)
+					cache.ColonistBuildingsByType.GetOrAdd(buildingType).Remove(b);
+					if (buildingType == typeof(Building))
 						break;
 
-					cache.ColonistBuildingsByType.GetOrAdd(buildingType).Remove(b);
+					buildingType = buildingType.BaseType;
 				}
-				while ((buildingType = buildingType.BaseType) != typeof(Building));
 			}
 			else
 			{
@@ -321,17 +347,43 @@ public sealed class Buildings : ClassWithFishPrepatches
 	public readonly record struct Cache()
 	{
 		public readonly FishTable<ThingDef, IndexedFishSet<Building>>
-			ColonistBuildingsByDef = [],
-			NonColonistBuildingsByDef = [];
+			ColonistBuildingsByDef = new() { ValueInitializer = static _ => InitializeBuildingsList<Building>() },
+			NonColonistBuildingsByDef = new() { ValueInitializer = static _ => InitializeBuildingsList<Building>() };
 
-		public readonly IndexedFishSet<Building_ResearchBench> ColonistResearchBenches = [];
+		public readonly IndexedFishSet<Building_ResearchBench> ColonistResearchBenches = InitializeBuildingsList<Building_ResearchBench>();
 		
-		public readonly IndexedFishSet<Building> ColonistDeepScanners = [];
+		public readonly IndexedFishSet<Building> ColonistDeepScanners = InitializeBuildingsList<Building>();
 
 		public readonly FishTable<Type, IList> ColonistBuildingsByType = new()
 		{
 			ValueInitializer = static type
-				=> (IList)Activator.CreateInstance(typeof(IndexedFishSet<>).MakeGenericType(type))
+				=> (IList)_buildingsListInitializerDefinition.MakeGenericMethod(type).Invoke(null, null)
 		};
+
+		private static readonly MethodInfo _buildingsListInitializerDefinition
+			= methodof(InitializeBuildingsList<Building>).GetGenericMethodDefinition();
+
+		public static unsafe IndexedFishSet<T> InitializeBuildingsList<T>() where T : Building
+#pragma warning disable CS8622
+			=> new(static () => new(0,
+				keyHashCodeByRefGetter: &GetKeyByRef,
+				keyHashCodeGetter: &ThingHelper.GetKey,
+				keyEqualityByRefComparer: &EqualsByKeyByRef,
+				keyEqualityComparer: &EqualsByKey));
+#pragma warning restore CS8622
+
+		private static int GetKeyByRef<T>(ref T thing) where T : Building => thing.GetKey();
+
+		private static bool EqualsByKey<T>(T? left, T? right) where T : Building
+			=> ReferenceEquals(left, right)
+				|| left is not null
+				&& right is not null
+				&& left.GetKey() == right.GetKey();
+
+		private static bool EqualsByKeyByRef<T>(ref T? left, ref T? right) where T : Building
+			=> ReferenceEquals(left, right)
+				|| left is not null
+				&& right is not null
+				&& left.GetKey() == right.GetKey();
 	}
 }

Source/PerformanceFish/Listers/Haulables.cs

@@ -183,22 +183,22 @@ public sealed class Haulables : ClassWithFishPrepatches
 		public readonly HashSet<Thing> ThingsQueuedToRemove = [];
 
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		public void CheckUpdate(List<Thing> haulables)
+		public void CheckUpdate(ICollection<Thing> haulables)
 		{
 			if (IsDirty(haulables))
 				Update(haulables);
 		}
 
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-		public bool IsDirty(List<Thing> haulables) => haulables.Count != ContainedThings.Count;
+		public bool IsDirty(ICollection<Thing> haulables) => haulables.Count != ContainedThings.Count;
 
 		[MethodImpl(MethodImplOptions.NoInlining)]
-		public void Update(List<Thing> haulables)
+		public void Update(ICollection<Thing> haulables)
 		{
 			ContainedThings.Clear();
 			
-			for (var i = haulables.Count; i-- > 0;)
-				ContainedThings.Add(haulables[i].GetKey());
+			foreach (var haulable in haulables)
+				ContainedThings.Add(haulable.GetKey());
 		}
 	}
 }

Source/PerformanceFish/Listers/Things.cs

@@ -12,6 +12,9 @@ namespace PerformanceFish.Listers;
 
 public sealed class ThingsPrepatches : ClassWithFishPrepatches
 {
+	private static readonly AccessTools.FieldRef<ListerThings, List<IHaulSource>> _haulSources
+		= AccessTools.FieldRefAccess<ListerThings, List<IHaulSource>>("haulSources");
+
 	public sealed class AddPatch : FishPrepatch
 	{
 		public override string? Description { get; }
@@ -31,6 +34,8 @@ public sealed class ThingsPrepatches : ClassWithFishPrepatches
 			lock (__instance.LockObject())
 			{
 				AddToDefList(__instance, t);
+				if (t is IHaulSource haulSource)
+					_haulSources(__instance).Add(haulSource);
 
 				var allGroups = ThingListGroupHelper.AllGroups;
 				foreach (var thingRequestGroup in allGroups)
@@ -74,6 +79,8 @@ public sealed class ThingsPrepatches : ClassWithFishPrepatches
 			lock (__instance.LockObject())
 			{
 				RemoveFromDefList(__instance, t);
+				if (t is IHaulSource haulSource)
+					_haulSources(__instance).Remove(haulSource);
 
 				var allGroups = ThingListGroupHelper.AllGroups;
 				for (var i = 0; i < allGroups.Length; i++)
@@ -268,6 +275,7 @@ public sealed class ThingsPrepatches : ClassWithFishPrepatches
 				
 				__instance.IndexMapByDef().Clear();
 				__instance.IndexMapByGroup().Clear();
+				_haulSources(__instance).Clear();
 				ClearTypeLists(__instance);
 			}
 			
@@ -568,9 +576,25 @@ public sealed class Things : ClassWithFishPatches
 		
 		public static unsafe IndexedFishSet<T> InitializeThingsList<T>() where T : Thing
 #pragma warning disable CS8622
-			=> new(static () => new(0, keyHashCodeByRefGetter: &GetKeyByRef, keyHashCodeGetter: &ThingHelper.GetKey));
+			=> new(static () => new(0,
+				keyHashCodeByRefGetter: &GetKeyByRef,
+				keyHashCodeGetter: &ThingHelper.GetKey,
+				keyEqualityByRefComparer: &EqualsByKeyByRef,
+				keyEqualityComparer: &EqualsByKey));
 #pragma warning restore CS8622
 
 		private static int GetKeyByRef<T>(ref T thing) where T : Thing => thing.GetKey();
+
+		private static bool EqualsByKey<T>(T? left, T? right) where T : Thing
+			=> ReferenceEquals(left, right)
+				|| left is not null
+				&& right is not null
+				&& left.GetKey() == right.GetKey();
+
+		private static bool EqualsByKeyByRef<T>(ref T? left, ref T? right) where T : Thing
+			=> ReferenceEquals(left, right)
+				|| left is not null
+				&& right is not null
+				&& left.GetKey() == right.GetKey();
 	}
 }

Source/PerformanceFish/LogPatches.cs

@@ -59,15 +59,16 @@ public sealed class LogPatches : ClassWithFishPrepatches
 		public static void InsertEarlyMessages()
 		{
 			var unhandledMessages = Log.UnhandledMessages;
-			if (unhandledMessages is null)
-				Debug.LogError("Message queue is null");
 
 			Log.Ready = true;
 
 			Verse.Log.messageQueue.Enqueue(new(LogMessageType.Message, PERFORMANCE_FISH_WELCOME_MESSAGE,
 				PERFORMANCE_FISH_WELCOME_STACKTRACE));
 
-			while (unhandledMessages!.TryDequeue(out var message))
+			if (unhandledMessages is null)
+				return;
+
+			while (unhandledMessages.TryDequeue(out var message))
 			{
 				try
 				{

Source/PerformanceFish/MiscOptimizations.cs

@@ -114,17 +114,30 @@ public sealed class MiscOptimizations : ClassWithFishPatches
 			= "Throttles rotting on misconfigured defs to only recalculate every 256 ticks, instead of constantly.";
 
 		public override MethodBase TargetMethodInfo { get; }
+#if V1_6
+			= AccessTools.DeclaredMethod(typeof(RimWorld.CompRottable), nameof(RimWorld.CompRottable.CompTickInterval),
+				[typeof(int)])!;
+#else
 			= AccessTools.Method(typeof(RimWorld.CompRottable), nameof(RimWorld.CompRottable.CompTick));
+#endif
 
 		public static CodeInstructions Transpiler(CodeInstructions codes, ILGenerator generator)
 			=> Reflection.GetCodeInstructions(Replacement, generator);
 
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+#if V1_6
+		public static void Replacement(RimWorld.CompRottable instance, int delta)
+		{
+			if ((TickHelper.TicksGame & 255) == (instance.parent.thingIDNumber & 255))
+				instance.TickInterval(256);
+		}
+#else
 		public static void Replacement(RimWorld.CompRottable instance)
 		{
 			if ((TickHelper.TicksGame & 255) == (instance.parent.thingIDNumber & 255))
 				instance.Tick(256);
 		}
+#endif
 	}
 
 	public sealed class RitualObligationTrigger_Date : FirstPriorityFishPatch

Source/PerformanceFish/ModsConfigPatches.cs

@@ -17,7 +17,8 @@ public sealed class ModsConfigPatches : ClassWithFishPrepatches
 			= "Fixes a MayRequire bug causing it to normally not recognize steam versions of mods if another local "
 			+ "copy exists.";
 
-		public override MethodBase TargetMethodBase { get; } = methodof(ModsConfig.AreAllActive);
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredMethod(typeof(ModsConfig), nameof(ModsConfig.AreAllActive), [typeof(string)])!;
 
 		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
 			=> IsActiveFix(ilProcessor, module);
@@ -29,7 +30,9 @@ public sealed class ModsConfigPatches : ClassWithFishPrepatches
 			= "Fixes a MayRequireAnyOf bug causing it to normally not recognize steam versions of mods if another "
 			+ "local copy exists, as well as its inability to strip whitespace.";
 
-		public override MethodBase TargetMethodBase { get; } = methodof(ModsConfig.IsAnyActiveOrEmpty);
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredMethod(typeof(ModsConfig), nameof(ModsConfig.IsAnyActiveOrEmpty),
+				[typeof(IEnumerable<string>), typeof(bool)])!;
 
 		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
 			=> IsActiveFix(ilProcessor, module);

Source/PerformanceFish/NeedsTrackerCaching.cs

@@ -0,0 +1,123 @@
+// Copyright (c) 2023 bradson
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+using System.Linq;
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using PerformanceFish.Prepatching;
+
+namespace PerformanceFish;
+
+// TODO: benchmark
+
+public sealed class NeedsTrackerCaching : ClassWithFishPrepatches
+{
+	public sealed class TryGetNeedPatch : FishPrepatch
+	{
+		public override string? Description { get; }
+			= "Caches generic need lookups behind the needs list version.";
+
+		public override MethodBase TargetMethodBase { get; } = GetTargetMethod(outParameter: false);
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(TryGetNeed<Need>);
+
+		public static T? TryGetNeed<T>(Pawn_NeedsTracker instance) where T : Need
+			=> TryGetNeedInternal(instance, out T? need) ? need : null;
+	}
+
+	public sealed class TryGetNeedOutPatch : FishPrepatch
+	{
+		public override string? Description { get; }
+			= "Caches generic need lookups behind the needs list version.";
+
+		public override MethodBase TargetMethodBase { get; } = GetTargetMethod(outParameter: true);
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(TryGetNeed<Need>);
+
+		public static bool TryGetNeed<T>(Pawn_NeedsTracker instance, out T? need) where T : Need
+			=> TryGetNeedInternal(instance, out need);
+	}
+
+	private static bool TryGetNeedInternal<T>(Pawn_NeedsTracker instance, out T? need) where T : Need
+	{
+		ref var cache
+			= ref Cache.ByReference<Pawn_NeedsTracker, RuntimeTypeHandle, CacheValue>.GetOrAddReference(instance,
+				typeof(T).TypeHandle);
+
+		var needs = instance.needs;
+		if (!cache.IsDirty(needs))
+		{
+			need = (T?)cache.Need;
+			return cache.Found;
+		}
+
+		return UpdateCache(instance, typeof(T), out need, ref cache);
+	}
+
+	[MethodImpl(MethodImplOptions.NoInlining)]
+	private static bool UpdateCache<T>(Pawn_NeedsTracker instance, Type needType, out T? need, ref CacheValue cache)
+		where T : Need
+	{
+		var needs = instance.needs;
+		for (var i = 0; i < needs.Count; i++)
+		{
+			var candidate = needs[i];
+			if (candidate.GetType() != needType)
+				continue;
+
+			need = (T)candidate;
+			cache.Update(needs, need, found: true);
+			return true;
+		}
+
+		need = null;
+		cache.Update(needs, null, found: false);
+		return false;
+	}
+
+	private static MethodInfo GetTargetMethod(bool outParameter)
+	{
+		foreach (var method in typeof(Pawn_NeedsTracker).GetMethods(AccessTools.all))
+		{
+			if (method.Name != nameof(Pawn_NeedsTracker.TryGetNeed)
+				|| !method.IsGenericMethodDefinition
+				|| method.GetParameters().Length != (outParameter ? 1 : 0))
+			{
+				continue;
+			}
+
+			return method;
+		}
+
+		return ThrowMissingMethodException(outParameter);
+	}
+
+	[MethodImpl(MethodImplOptions.NoInlining)]
+	private static MethodInfo ThrowMissingMethodException(bool outParameter)
+		=> throw new MissingMethodException(
+			$"Could not find Pawn_NeedsTracker.TryGetNeed generic overload with {(outParameter ? "one" : "zero")} parameter(s).");
+
+	public record struct CacheValue()
+	{
+		private List<Need>? _listReference;
+		private int _listVersion = -2;
+		public Need? Need;
+		public bool Found;
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public bool IsDirty(List<Need> needs) => !ReferenceEquals(needs, _listReference) || needs._version != _listVersion;
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public void Update(List<Need> needs, Need? need, bool found)
+		{
+			_listReference = needs;
+			_listVersion = needs._version;
+			Need = need;
+			Found = found;
+		}
+	}
+}

Source/PerformanceFish/OnAssembliesLoaded.cs

@@ -50,8 +50,10 @@ public static class OnAssembliesLoaded
 			try
 			{
 				if (!patchClass.RequiresLoadedGameForPatching)
+				{
 					patchClass.Patches.PatchAll();
 				}
+			}
 			catch (Exception ex)
 			{
 				Log.Error($"{PerformanceFishMod.NAME} encountered an exception while trying to initialize {

Source/PerformanceFish/Patching/FishPatch.cs

@@ -193,8 +193,6 @@ public abstract class FishPatch : SingletonFactory<FishPatch>, IExposable, IHasD
 		Patched = true;
 		foreach (var method in TargetMethodInfos)
 		{
-			DebugLog.Message($"Performance Fish is applying {GetType().Name} on {method.FullDescription()}");
-
 			try
 			{
 				if (IsBenchmarking)
@@ -232,6 +230,7 @@ public abstract class FishPatch : SingletonFactory<FishPatch>, IExposable, IHasD
 							finalizer: TryMakeHarmonyMethod(FinalizerMethodInfo, FinalizerMethodPriority)));
 					}
 				}
+
 			}
 			catch (Exception e)
 			{
@@ -291,6 +290,9 @@ public abstract class FishPatch : SingletonFactory<FishPatch>, IExposable, IHasD
 	private MethodInfo? TryGetMethod(string nameCaseInsensitive, Predicate<MethodInfo>? predicate = null)
 		=> GetType().TryGetMethod(nameCaseInsensitive, predicate);
 
+	private static string GetTargetMethodName(MethodBase method)
+		=> $"{method.DeclaringType?.FullName ?? "<no-type>"}.{method.Name}";
+
 	private static int TryGetPriority(MethodInfo? info)
 		=> info?.TryGetAttribute<HarmonyPriority>()?.info.priority ?? Priority.Normal;
 	

Source/PerformanceFish/Patching/FishPatchHolder.cs

@@ -59,7 +59,9 @@ public class FishPatchHolder : IExposable, IEnumerable<FishPatch>
 
 	private void AddPatchesRecursively(Type type)
 	{
-		if (typeof(FishPatch).IsAssignableFrom(type) && !All.ContainsKey(type))
+		if (typeof(FishPatch).IsAssignableFrom(type)
+			&& !type.IsAbstract
+			&& !All.ContainsKey(type))
 		{
 			if (PerformanceFishMod.AllPatchClasses is { } allPatches)
 				RemoveDupes(allPatches, type);

Source/PerformanceFish/PerformanceFish.sln

@@ -5,6 +5,8 @@ VisualStudioVersion = 17.1.31911.260
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "1.5", "1.5.csproj", "{E8A3D63E-5850-4866-AB06-DBD44B11F67B}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "1.6", "1.6.csproj", "{8B299603-8E75-4C35-AFC8-89748599E689}"
+EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "1.4", "1.4.csproj", "{0257ABCD-7009-4C7D-9BD8-599FC47595DB}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{6948F7E6-7ED7-4716-87EF-CFF1F465F561}"
@@ -24,6 +26,10 @@ Global
 		{E8A3D63E-5850-4866-AB06-DBD44B11F67B}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{E8A3D63E-5850-4866-AB06-DBD44B11F67B}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{E8A3D63E-5850-4866-AB06-DBD44B11F67B}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8B299603-8E75-4C35-AFC8-89748599E689}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8B299603-8E75-4C35-AFC8-89748599E689}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8B299603-8E75-4C35-AFC8-89748599E689}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8B299603-8E75-4C35-AFC8-89748599E689}.Release|Any CPU.Build.0 = Release|Any CPU
 		{0257ABCD-7009-4C7D-9BD8-599FC47595DB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{0257ABCD-7009-4C7D-9BD8-599FC47595DB}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{0257ABCD-7009-4C7D-9BD8-599FC47595DB}.Release|Any CPU.ActiveCfg = Release|Any CPU

Source/PerformanceFish/Planet/WorldObjectsOptimization.cs

@@ -15,6 +15,10 @@ public sealed class WorldObjectsOptimization : ClassWithFishPrepatches
 {
 	public sealed class WorldObjectsHolderTickPatch : FishPrepatch
 	{
+		private static FishTable<Type, bool> _skippableCompTypes = null!;
+		private static FishTable<Type, bool> _skippableWorldObjectTypes = null!;
+		private static readonly List<IThingHolder> _tmpThingHolders = [];
+
 		public override string? Description { get; }
 			= "The world objects holder is responsible for ticking every world object. This includes settlements, "
 			+ "caravans, outposts and any other object placed in the world, instead of maps. Normally it ticks "
@@ -35,7 +39,11 @@ public sealed class WorldObjectsOptimization : ClassWithFishPrepatches
 
 			var worldObjects = WorldObjectsHolder.tmpWorldObjects;
 			for (var i = worldObjects.Count; i-- > 0;)
+#if V1_6
+				worldObjects[i].DoTick();
+#else
 				worldObjects[i].Tick();
+#endif
 		}
 
 		public static void UpdateCache(WorldObjectsHolder instance)
@@ -50,7 +58,7 @@ public sealed class WorldObjectsOptimization : ClassWithFishPrepatches
 				var worldObject = instanceWorldObjects[i];
 
 				if (worldObject is not MapParent { HasMap: true }
-					&& SkippableWorldObjects.Contains(worldObject.GetType())
+					&& CanSkipWorldObjectTick(worldObject)
 					&& (worldObject is not Settlement settlement || settlement.trader?.stock is null) 
 					&& CanSkipCompTick(worldObject))
 				{
@@ -64,9 +72,46 @@ public sealed class WorldObjectsOptimization : ClassWithFishPrepatches
 			CachedMapsVersion = Current.gameInt.maps._version;
 		}
 
+		private static bool CanSkipWorldObjectTick(WorldObject worldObject)
+		{
+			return IsSkippableWorldObjectType(worldObject.GetType()) && !HasTickableContents(worldObject);
+		}
+
+		private static bool HasTickableContents(WorldObject worldObject)
+		{
+			if (worldObject is not IThingHolder holder)
+				return false;
+
+			lock (_tmpThingHolders)
+			{
+				_tmpThingHolders.Clear();
+				_tmpThingHolders.Add(holder);
+				holder.GetChildHolders(_tmpThingHolders);
+
+				for (var i = 0; i < _tmpThingHolders.Count; i++)
+				{
+					var thingHolder = _tmpThingHolders[i];
+					if (thingHolder is IThingHolderTickable tickable && !tickable.ShouldTickContents)
+						continue;
+
+					var directlyHeldThings = thingHolder.GetDirectlyHeldThings();
+					if (directlyHeldThings?.Owner is not null and not Map and not Caravan)
+					{
+						_tmpThingHolders.Clear();
+						return true;
+					}
+				}
+
+				_tmpThingHolders.Clear();
+				return false;
+			}
+		}
+
 		private static bool CanSkipCompTick(WorldObject worldObject)
 		{
 			var comps = worldObject.comps;
+			if (comps.Count == 0)
+				return true;
 
 			for (var i = comps.Count; i-- > 0;)
 			{
@@ -74,10 +119,8 @@ public sealed class WorldObjectsOptimization : ClassWithFishPrepatches
 				if (comp is EnterCooldownComp { Active: true })
 					return false;
 
-				if (!SkippableComps.Contains(comp.GetType()))
+				if (!IsSkippableCompType(comp.GetType()))
 					return false;
-				
-				comp.CompTick();
 			}
 
 			return true;
@@ -90,10 +133,7 @@ public sealed class WorldObjectsOptimization : ClassWithFishPrepatches
 		private static Type?[]
 			_whitelistedTickingCompTypes =
 			[
-				typeof(WorldObjectComp),
-				typeof(FormCaravanComp),
-				typeof(TimedDetectionRaids),
-				typeof(EnterCooldownComp)
+				typeof(WorldObjectComp)
 			],
 			_whitelistedWorldObjectTypes =
 			[
@@ -106,28 +146,69 @@ public sealed class WorldObjectsOptimization : ClassWithFishPrepatches
 		public static void AddCompToWhiteList(Type compType)
 		{
 			_whitelistedTickingCompTypes = _whitelistedTickingCompTypes.Add(compType);
-			SkippableComps = InitializeSkippableComps();
+			ResetSkippableCompTypes();
 		}
 
 		public static void AddWorldObjectToWhiteList(Type worldObjectType)
 		{
 			_whitelistedWorldObjectTypes = _whitelistedWorldObjectTypes.Add(worldObjectType);
-			SkippableWorldObjects = InitializeSkippableWorldObjects();
+			ResetSkippableWorldObjectTypes();
 		}
 
-		public static HashSet<Type>
-			SkippableComps = InitializeSkippableComps(),
-			SkippableWorldObjects = InitializeSkippableWorldObjects();
+		private static void ResetSkippableCompTypes()
+		{
+			_skippableCompTypes = new()
+			{
+				ValueInitializer = static type => ComputeIsSkippableCompType(type)
+			};
+		}
 
-		private static HashSet<Type> InitializeSkippableComps()
-			=> MakeSubclassHashSet(typeof(WorldObjectComp), nameof(WorldObjectComp.CompTick),
-				_whitelistedTickingCompTypes);
+		private static void ResetSkippableWorldObjectTypes()
+		{
+			_skippableWorldObjectTypes = new()
+			{
+				ValueInitializer = static type => ComputeIsSkippableWorldObjectType(type)
+			};
+		}
 
-		private static HashSet<Type> InitializeSkippableWorldObjects()
-			=> MakeSubclassHashSet(typeof(WorldObject), nameof(WorldObject.Tick), _whitelistedWorldObjectTypes);
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		private static bool IsSkippableCompType(Type type) => _skippableCompTypes.GetOrAdd(type);
 
-		private static HashSet<Type> MakeSubclassHashSet(Type type, string name, Type?[] allowedDeclaringTypes)
-			=> type.SubclassesWithNoMethodOverrideAndSelf(allowedDeclaringTypes, name).ToHashSet();
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		private static bool IsSkippableWorldObjectType(Type type) => _skippableWorldObjectTypes.GetOrAdd(type);
+
+		private static bool ComputeIsSkippableCompType(Type type)
+		{
+			if (AccessTools.Method(type, nameof(WorldObjectComp.CompTick))?.DeclaringType is not { } declaringType
+				|| !_whitelistedTickingCompTypes.Contains(declaringType))
+			{
+				return false;
+			}
+
+#if V1_6
+			return AccessTools.Method(type, nameof(WorldObjectComp.CompTickInterval), [typeof(int)])?.DeclaringType
+				is { } intervalDeclaringType
+				&& _whitelistedTickingCompTypes.Contains(intervalDeclaringType);
+#else
+			return true;
+#endif
+		}
+
+		private static bool ComputeIsSkippableWorldObjectType(Type type)
+		{
+			if (AccessTools.Method(type, "Tick")?.DeclaringType is not { } declaringType
+				|| !_whitelistedWorldObjectTypes.Contains(declaringType))
+			{
+				return false;
+			}
+
+#if V1_6
+			return AccessTools.Method(type, "TickInterval", [typeof(int)])?.DeclaringType is { } intervalDeclaringType
+				&& _whitelistedWorldObjectTypes.Contains(intervalDeclaringType);
+#else
+			return true;
+#endif
+		}
 
 		public static bool CacheDirty(WorldObjectsHolder instance)
 			=> CachedWorldObjectsVersion != instance.worldObjects._version
@@ -135,7 +216,12 @@ public sealed class WorldObjectsOptimization : ClassWithFishPrepatches
 
 		public static void SetDirty() => CachedWorldObjectsVersion = CachedMapsVersion = -2;
 
-		static WorldObjectsHolderTickPatch() => Cache.Utility.Cleared += SetDirty;
+		static WorldObjectsHolderTickPatch()
+		{
+			ResetSkippableCompTypes();
+			ResetSkippableWorldObjectTypes();
+			Cache.Utility.Cleared += SetDirty;
+		}
 	}
 
 	public sealed class ExpandingIconCaching : FishPrepatch

Source/PerformanceFish/PrepatcherFields.cs

@@ -9,6 +9,7 @@ using PerformanceFish.Hauling;
 using PerformanceFish.Planet;
 using Prepatcher;
 using RimWorld.Planet;
+using PFMapEvents = PerformanceFish.Events.MapEvents;
 
 namespace PerformanceFish;
 
@@ -22,7 +23,7 @@ public static class PrepatcherFields
 	[PrepatcherField]
 	[ValueInitializer(nameof(CreateMapEvents))]
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
-	public static extern MapEvents.Instanced Events(this Map map);
+	public static extern PFMapEvents.Instanced Events(this Map map);
 
 	[PrepatcherField]
 	[ValueInitializer(nameof(CreateThingEvents))]
@@ -175,7 +176,7 @@ public static class PrepatcherFields
 	public static FishTable<GroupThingPair, int> CreateIndexMapByGroup() => new();
 	public static Cache.CellGrid<int> CreateItemCountGrid(Map map) => new(map);
 	public static Cache.BitCellGrid CreateBitCellGrid(Map map) => new(map);
-	public static MapEvents.Instanced CreateMapEvents() => new();
+	public static PFMapEvents.Instanced CreateMapEvents() => new();
 	public static ThingEvents.Instanced CreateThingEvents() => new();
 	public static StorageSettingsPatches.StorageSettingsCache CreateStorageSettingsCache() => new();
 	public static StorageDistrict[] GetDefaultDistrictArray() => StorageDistrict.GetDefaultArray();

Source/PerformanceFish/Prepatching/FishPrepatch.cs

@@ -4,6 +4,7 @@
 // file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 using System.Diagnostics;
+using System.Linq;
 using Mono.Cecil;
 using Mono.Cecil.Cil;
 using Mono.Cecil.Rocks;
@@ -192,14 +193,26 @@ public abstract class FishPrepatch : FishPrepatchBase
 		var stateParameter = postfixParameters.TryGetNamed("__state");
 		// Verify? It would make sense to match against prefix state
 
-		// var skipOriginalFlag = ilProcessor.DeclareLocal(typeof(bool));
-		var resultVariable = GetResultVariable(ilProcessor, ref patchVariables, resultParameter, targetMethod);
+		var hasReturnValue = targetMethod.ReturnType.FullName != module.TypeSystem.Void.FullName;
+		var resultVariable = hasReturnValue
+			? patchVariables.Result ??= ilProcessor.DeclareLocal(targetMethod.ReturnType)
+			: GetResultVariable(ilProcessor, ref patchVariables, resultParameter, targetMethod);
 		var stateVariable = GetStateVariable(ilProcessor, ref patchVariables, stateParameter);
+		var retInstructions = instructions.Where(static instruction => instruction.OpCode == OpCodes.Ret).ToArray();
+		if (retInstructions.Length == 0)
+			return;
 
 		var postfixInstructions = new Collection<object>();
 		
-		if (resultVariable != null)
-			postfixInstructions.Add((OpCodes.Stloc, resultVariable));
+		if (hasReturnValue)
+		{
+			postfixInstructions.Add((OpCodes.Stloc, resultVariable!));
+			postfixInstructions.Add(OpCodes.Nop);
+		}
+		else
+		{
+			postfixInstructions.Add(OpCodes.Nop);
+		}
 
 		foreach (var parameter in postfixParameters)
 		{
@@ -217,36 +230,87 @@ public abstract class FishPrepatch : FishPrepatchBase
 			postfixInstructions.Add((OpCodes.Call, postfixMethodInfo));
 		}
 
-		if (postfixMethodInfo.ReturnType == typeof(void) && resultVariable != null)
-			postfixInstructions.Add((OpCodes.Ldloc, resultVariable));
+		if (postfixMethodInfo.ReturnType != typeof(void))
+			postfixInstructions.Add((OpCodes.Stloc, resultVariable!));
 		
-		Span<int> retInstructions = stackalloc int[instructions.Count];
-		var retInstructionCount = 0;
+		if (hasReturnValue)
+			postfixInstructions.Add((OpCodes.Ldloc, resultVariable!));
 
-		for (var i = 0; i < instructions.Count; i++)
-		{
-			if (instructions[i].OpCode == OpCodes.Ret)
-				retInstructions[retInstructionCount++] = i;
-		}
-
-		var lastRetInstructionIndex = retInstructions[retInstructionCount - 1];
+		var lastRetInstruction = retInstructions[^1];
+		var lastRetInstructionIndex = instructions.IndexOf(lastRetInstruction);
 		ilProcessor.InsertRange(lastRetInstructionIndex, postfixInstructions);
+		var captureStart = instructions[lastRetInstructionIndex];
+		var postfixStart = instructions[lastRetInstructionIndex + (hasReturnValue ? 1 : 0)];
 
-		for (var i = 0; i < instructions.Count; i++)
+		RetargetExceptionHandlerEnds(targetMethod.Body, lastRetInstruction, captureStart);
+		var retInstructionSet = retInstructions.ToHashSet();
+		foreach (var instruction in instructions)
 		{
-			var instruction = instructions[i];
-			if (instruction.Operand is Instruction branchTarget && branchTarget.OpCode == OpCodes.Ret)
-				instruction.Operand = instructions[lastRetInstructionIndex];
+			if (instruction.Operand is Instruction branchTarget && retInstructionSet.Contains(branchTarget))
+				instruction.Operand = captureStart;
 		}
 
-		for (var i = 0; i < retInstructionCount - 1; i++)
+		for (var i = 0; i < retInstructions.Length - 1; i++)
 		{
-			var instruction = instructions[retInstructions[i]];
-			instruction.OpCode = OpCodes.Br;
-			instruction.Operand = instructions[lastRetInstructionIndex];
+			var instruction = retInstructions[i];
+			if (hasReturnValue)
+				ilProcessor.InsertBefore(instruction, Instruction.Create(OpCodes.Stloc, resultVariable!));
+
+			instruction.OpCode = IsInProtectedRegion(targetMethod.Body, instruction) ? OpCodes.Leave : OpCodes.Br;
+			instruction.Operand = postfixStart;
 		}
 	}
 
+	private static void RetargetExceptionHandlerEnds(Mono.Cecil.Cil.MethodBody methodBody, Instruction oldBoundary,
+		Instruction newBoundary)
+	{
+		foreach (var exceptionHandler in methodBody.ExceptionHandlers)
+		{
+			if (exceptionHandler.TryEnd == oldBoundary)
+				exceptionHandler.TryEnd = newBoundary;
+			if (exceptionHandler.HandlerEnd == oldBoundary)
+				exceptionHandler.HandlerEnd = newBoundary;
+		}
+	}
+
+	private static bool IsInProtectedRegion(Mono.Cecil.Cil.MethodBody methodBody, Instruction instruction)
+	{
+		var instructions = methodBody.Instructions;
+		var instructionIndex = instructions.IndexOf(instruction);
+		
+		foreach (var exceptionHandler in methodBody.ExceptionHandlers)
+		{
+			if (IsWithinRange(instructions, instructionIndex, exceptionHandler.TryStart, exceptionHandler.TryEnd)
+				|| IsWithinRange(instructions, instructionIndex, exceptionHandler.HandlerStart,
+					exceptionHandler.HandlerEnd)
+				|| exceptionHandler.FilterStart != null
+				&& IsWithinRange(instructions, instructionIndex, exceptionHandler.FilterStart,
+					exceptionHandler.HandlerStart))
+			{
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	private static bool IsWithinRange(Mono.Collections.Generic.Collection<Instruction> instructions,
+		int instructionIndex, Instruction? rangeStart, Instruction? rangeEnd)
+	{
+		if (rangeStart == null)
+			return false;
+
+		var rangeStartIndex = instructions.IndexOf(rangeStart);
+		if (rangeStartIndex < 0 || instructionIndex < rangeStartIndex)
+			return false;
+
+		if (rangeEnd == null)
+			return true;
+
+		var rangeEndIndex = instructions.IndexOf(rangeEnd);
+		return rangeEndIndex < 0 || instructionIndex < rangeEndIndex;
+	}
+
 	private static VariableDefinition? GetStateVariable(ILProcessor ilProcessor, ref PatchVariables patchVariables,
 		ParameterInfo? stateParameter)
 		=> stateParameter != null

Source/PerformanceFish/Prepatching/FishPrepatchExtensions.cs

@@ -13,8 +13,9 @@ public static class FishPrepatchExtensions
 	{
 		var prepatches = ToSortedList(allPrepatchClasses, true);
 		
-		foreach (var prepatch in prepatches)
+		for (var i = 0; i < prepatches.Count; i++)
 		{
+			var prepatch = prepatches[i];
 			if (!prepatch.Enabled)
 				continue;
 			
@@ -40,8 +41,9 @@ public static class FishPrepatchExtensions
 	{
 		var prepatches = ToSortedList(allPrepatchClasses, false);
 
-		foreach (var prepatch in prepatches)
+		for (var i = 0; i < prepatches.Count; i++)
 		{
+			var prepatch = prepatches[i];
 			if (!prepatch.IsActive)
 				continue;
 			
@@ -70,4 +72,5 @@ public static class FishPrepatchExtensions
 		prepatches.Sort(FishPrepatchBase.PriorityComparer);
 		return prepatches;
 	}
+
 }

Source/PerformanceFish/Prepatching/FishPrepatchHolder.cs

@@ -37,7 +37,9 @@ public class FishPrepatchHolder : IExposable, IEnumerable<FishPrepatchBase>
 
 	private void AddPatchesRecursively(Type type)
 	{
-		if (typeof(FishPrepatchBase).IsAssignableFrom(type) && !All.ContainsKey(type))
+		if (typeof(FishPrepatchBase).IsAssignableFrom(type)
+			&& !type.IsAbstract
+			&& !All.ContainsKey(type))
 		{
 			if (PerformanceFishMod.AllPrepatchClasses is { } allPatches)
 				RemoveDupes(allPatches, type);

Source/PerformanceFish/Rendering/DynamicDrawManagerPatches.cs

@@ -68,24 +68,44 @@ public sealed class DynamicDrawManagerPatches : ClassWithFishPrepatches
 		public static void CullAndInitializeThings(DynamicDrawManager instance)
 		{
 			var map = instance.map;
-			var mapSizeX = map.SizeX();
+			var cellIndices = map.cellIndices;
+			var mapSizeX = GetMapSizeX(cellIndices);
 			var fogGrid = map.fogGrid.fogGrid;
 			var snowGrid = map.snowGrid.depthGrid;
 			var checkShadows = MatBases.SunShadow.shader.isSupported;
-			var currentViewRect = Find.CameraDriver.CurrentViewRect.ClipInsideMap(map).ExpandedBy(1);
+			var currentViewRect = Find.CameraDriver.CurrentViewRect.ExpandedBy(1);
+#if V1_6
+			if (WorldComponent_GravshipController.GravshipRenderInProgess)
+				currentViewRect = currentViewRect.Encapsulate(WorldComponent_GravshipController.GravshipRenderBounds);
+#endif
+			currentViewRect = currentViewRect.ClipInsideMap(map);
 			var shadowViewRect = SectionLayer_SunShadows.GetSunShadowsViewRect(map, currentViewRect);
 			instance.drawThings.UnwrapArray(out var drawThings, out var drawThingsCount);
 			
 			for (var i = 0; i < drawThingsCount; i++)
 			{
 				var drawThing = drawThings.UnsafeLoad(i);
-				var position = drawThing.Position;
+				var position = GetCullPosition(drawThing);
 				var drawThingDef = drawThing.def;
 				var cellIndex = position.CellToIndex(mapSizeX);
-				if ((!fogGrid[cellIndex] || drawThingDef.seeThroughFog)
-					&& (drawThingDef.hideAtSnowDepth >= 1f
-						|| drawThingDef.hideAtSnowDepth >= snowGrid[cellIndex]))
+				if (!CellIndicesContain(cellIndices, cellIndex)
+					|| (!drawThingDef.seeThroughFog
+#if V1_6
+						&& fogGrid.IsSet(cellIndex))
+#else
+						&& fogGrid[cellIndex])
+#endif
+#if V1_6
+					|| (drawThingDef.hideAtSnowOrSandDepth < 1f
+						&& snowGrid[cellIndex] > drawThingDef.hideAtSnowOrSandDepth))
+#else
+					|| (drawThingDef.hideAtSnowDepth < 1f
+						&& snowGrid[cellIndex] > drawThingDef.hideAtSnowDepth))
+#endif
 				{
+					continue;
+				}
+
 				if (currentViewRect.Contains(position)
 					|| currentViewRect.Overlaps(drawThing.OccupiedDrawRect()))
 				{
@@ -94,13 +114,32 @@ public sealed class DynamicDrawManagerPatches : ClassWithFishPrepatches
 					if (!DebugViewSettings.singleThreadedDrawing)
 						EnsureInitialized(drawThing);
 				}
-					else if (drawThing is Pawn pawn && checkShadows && shadowViewRect.Contains(drawThing.Position))
+				else if (drawThing is Pawn pawn && checkShadows && shadowViewRect.Contains(position))
 				{
 					PawnShadowsToDraw.Add(pawn);
 				}
 			}
 		}
-		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		private static IntVec3 GetCullPosition(Thing drawThing)
+			=> drawThing is Pawn ? drawThing.DrawPos.ToIntVec3() : drawThing.Position;
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		private static bool CellIndicesContain(CellIndices cellIndices, int index)
+#if V1_6
+			=> cellIndices.Contains(index);
+#else
+			=> (uint)index < (uint)(cellIndices.mapSizeX * cellIndices.mapSizeZ);
+#endif
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		private static int GetMapSizeX(CellIndices cellIndices)
+#if V1_6
+			=> cellIndices.SizeX;
+#else
+			=> cellIndices.mapSizeX;
+#endif
 
 		public static void EnsureInitialized(Thing drawThing)
 		{

Source/PerformanceFish/Rendering/PawnRenderingOptimizations.cs

@@ -0,0 +1,134 @@
+// Copyright (c) 2026 Bradson
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using PerformanceFish.Prepatching;
+
+namespace PerformanceFish.Rendering;
+
+public sealed class PawnRenderingOptimizations : ClassWithFishPrepatches
+{
+	private const int DAMAGE_FLASH_TICKS_TOTAL = 16;
+
+	public sealed class IsHiddenFromPlayerPatch : FishPrepatch
+	{
+		// not 100% on this even benefitting, bionics, scars, etc likely worsen performance here because of the extra check
+		// probably better to just track if a hediff adds invisibility
+		public override string? Description { get; }
+			= "Fast-paths InvisibilityUtility.IsHiddenFromPlayer for the case where a pawn has no hediffs.";
+
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredMethod(typeof(InvisibilityUtility),
+				nameof(InvisibilityUtility.IsHiddenFromPlayer), [typeof(Pawn)]);
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static bool ReplacementBody(Pawn pawn)
+		{
+			if (DebugSettings.showHiddenPawns)
+				return false;
+
+			if (pawn.Faction == Faction.OfPlayer)
+				return false;
+
+			var hediffs = pawn.health.hediffSet.hediffs;
+			if (hediffs.Count == 0)
+				return false;
+
+			for (var i = 0; i < hediffs.Count; i++)
+			{
+				var comp = hediffs[i].TryGetComp<HediffComp_Invisibility>();
+				if (comp != null && !comp.Props.visibleToPlayer && !comp.PsychologicallyVisible)
+					return true;
+			}
+
+			return false;
+		}
+	}
+
+	public sealed class PawnRenderTreeComputeMatrixPatch : FishPrepatch
+	{
+		public override string? Description { get; }
+			= "Avoids Matrix4x4 inverse work when undoing a pivot translation in PawnRenderTree.ComputeMatrix.";
+
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredMethod(typeof(PawnRenderTree), "ComputeMatrix");
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static void ReplacementBody(PawnRenderTree instance, ref Matrix4x4 matrix, in Vector3 offset,
+			in Vector3 pivot, in Quaternion rotation, in Vector3 scale, bool canRotate)
+		{
+			if (offset != Vector3.zero)
+				matrix *= Matrix4x4.Translate(offset);
+
+			if (pivot != Vector3.zero)
+				matrix *= Matrix4x4.Translate(pivot);
+
+			if (canRotate && rotation != Quaternion.identity)
+				matrix *= Matrix4x4.Rotate(rotation);
+
+			if (scale != Vector3.one)
+				matrix *= Matrix4x4.Scale(scale);
+
+			if (pivot != Vector3.zero)
+				matrix *= Matrix4x4.Translate(-pivot);
+		}
+	}
+
+	public sealed class DamageFlasherCurColorPatch : FishPrepatch
+	{
+		private static readonly AccessTools.FieldRef<DamageFlasher, int> _lastDamageTick
+			= AccessTools.FieldRefAccess<DamageFlasher, int>("lastDamageTick");
+
+		public override string? Description { get; }
+			= "Fast-paths DamageFlasher.CurColor when no damage flash is active.";
+
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredPropertyGetter(typeof(DamageFlasher), nameof(DamageFlasher.CurColor));
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static Color ReplacementBody(DamageFlasher instance)
+		{
+			var ticksLeft = _lastDamageTick(instance) + DAMAGE_FLASH_TICKS_TOTAL - Find.TickManager.TicksGame;
+			return ticksLeft <= 0
+				? Color.white
+				: Color.Lerp(Color.white, DamagedMatPool.DamagedMatStartingColor,
+					(float)ticksLeft / DAMAGE_FLASH_TICKS_TOTAL);
+		}
+	}
+
+	public sealed class DamageFlasherGetDamagedMatPatch : FishPrepatch
+	{
+		private static readonly AccessTools.FieldRef<DamageFlasher, int> _lastDamageTick
+			= AccessTools.FieldRefAccess<DamageFlasher, int>("lastDamageTick");
+
+		public override string? Description { get; }
+			= "Fast-paths DamageFlasher.GetDamagedMat when no damage flash is active.";
+
+		public override MethodBase TargetMethodBase { get; }
+			= AccessTools.DeclaredMethod(typeof(DamageFlasher), nameof(DamageFlasher.GetDamagedMat));
+
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static Material ReplacementBody(DamageFlasher instance, Material baseMat)
+		{
+			var ticksLeft = _lastDamageTick(instance) + DAMAGE_FLASH_TICKS_TOTAL - Find.TickManager.TicksGame;
+			return ticksLeft <= 0
+				? baseMat
+				: DamagedMatPool.GetDamageFlashMat(baseMat, (float)ticksLeft / DAMAGE_FLASH_TICKS_TOTAL);
+		}
+	}
+}

Source/PerformanceFish/Rendering/TextureAtlasPatches.cs

@@ -0,0 +1,52 @@
+// Copyright (c) 2023 bradson
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+namespace PerformanceFish.Rendering;
+
+public sealed class TextureAtlasPatches : ClassWithFishPatches
+{
+	public sealed class StaticTextureAtlas_ApplyTextureCompression : FishPatch
+	{
+		public override bool DefaultState => false;
+
+		public override string? Description { get; }
+			= "Routes texture atlas compression through the GPU path when compute shaders are available, "
+			+ "regardless of the VRAM threshold check in UnityData.ComputeShadersSupported. Prevents native "
+			+ "crashes in debug Mono builds.";
+
+		public override MethodBase TargetMethodInfo
+			=> AccessTools.DeclaredMethod(typeof(StaticTextureAtlas), "ApplyTextureCompression");
+
+		public static bool Prefix(StaticTextureAtlas __instance, bool noGpuCompressionSupport)
+		{
+			if (!noGpuCompressionSupport || !SystemInfo.supportsComputeShaders)
+				return true;
+
+			if (__instance.ColorTexture != null)
+			{
+				var name = __instance.ColorTexture.name;
+				var compressed = StaticTextureAtlas.FastCompressDXT(__instance.ColorTexture, deleteOriginal: true);
+				compressed.name = name;
+				_colorTextureField.SetValue(__instance, compressed);
+			}
+
+			if (__instance.MaskTexture != null)
+			{
+				var name = __instance.MaskTexture.name;
+				var compressed = StaticTextureAtlas.FastCompressDXT(__instance.MaskTexture, deleteOriginal: true);
+				compressed.name = name;
+				_maskTextureField.SetValue(__instance, compressed);
+			}
+
+			return false;
+		}
+
+		private static readonly FieldInfo _colorTextureField
+			= AccessTools.DeclaredField(typeof(StaticTextureAtlas), "colorTexture");
+
+		private static readonly FieldInfo _maskTextureField
+			= AccessTools.DeclaredField(typeof(StaticTextureAtlas), "maskTexture");
+	}
+}

Source/PerformanceFish/Rendering/TextureLoadingPatches.cs

@@ -93,7 +93,7 @@ public sealed class TextureLoadingPatches : ClassWithFishPrepatches
 				var data = file.ReadAllBytes();
 				texture2D = new(2, 2, TextureFormat.Alpha8, true);
 				texture2D.LoadImage(data);
-				FixMipMapsIfNeeded(texture2D, data, file);
+				FixMipMapsIfNeeded(ref texture2D, data, file);
 			}
 
 			if (!isDds && Prefs.TextureCompression)
@@ -120,11 +120,11 @@ public sealed class TextureLoadingPatches : ClassWithFishPrepatches
 
 			var texture2D = new Texture2D(2, 2, TextureFormat.Alpha8, true);
 			texture2D.LoadImage(data);
-			FixMipMapsIfNeeded(texture2D, data, file);
+			FixMipMapsIfNeeded(ref texture2D, data, file);
 			return texture2D;
 		}
 
-		public static void FixMipMapsIfNeeded(Texture2D texture2D, byte[] data, VirtualFile file)
+		public static void FixMipMapsIfNeeded(ref Texture2D texture2D, byte[] data, VirtualFile file)
 		{
 			if (((texture2D.width & 3) == 0) & ((texture2D.height & 3) == 0))
 				return;

Source/PerformanceFish/RoomOptimizations.cs

@@ -349,8 +349,7 @@ public sealed class RoomOptimizations : ClassWithFishPatches, IHasDescription
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
 		public static Room? RoomAt(IntVec3 c, Map map, RegionType allowedRegionTypes = RegionType.Set_All)
 		{
-			var cellIndices = map.cellIndices;
-			if (((uint)c.x >= (uint)cellIndices.mapSizeX) | ((uint)c.z >= (uint)cellIndices.mapSizeZ))
+			if (!c.InBounds(map))
 				return null;
 
 			var regionAndRoomUpdater = map.regionAndRoomUpdater;
@@ -360,8 +359,8 @@ public sealed class RoomOptimizations : ClassWithFishPatches, IHasDescription
 			else if (regionAndRoomUpdater.AnythingToRebuild)
 				LogIncorrectResultWarning(c);
 
-			var region = map.regionGrid.regionGrid[(c.z * cellIndices.mapSizeX) + c.x];
-			return region is null || !region.valid || (region.type & allowedRegionTypes) == 0
+			var region = map.regionGrid.GetValidRegionAt_NoRebuild(c);
+			return region is null || (region.type & allowedRegionTypes) == 0
 				? null
 				: region.District?.Room;
 		}

Source/PerformanceFish/System/ReflectionCaching.cs

@@ -382,6 +382,8 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 
 		public sealed class GetFullName : FishPatch
 		{
+			public override bool DefaultState => true;
+
 			public override string? Description { get; }
 				= "Normally averages at over 1000ns per call. Caching makes this about 30 times faster, including "
 				+ "Harmony overhead. Type.Name is similarly slow too, but unfortunately can't be patched as it's an "
@@ -392,54 +394,83 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 				= AccessTools.DeclaredPropertyGetter(typeof(RuntimeType), nameof(RuntimeType.FullName));
 
 			[MethodImpl(MethodImplOptions.AggressiveInlining)]
-			public static bool Prefix(RuntimeType __instance, ref string? __result, out bool __state)
+			public static bool Prefix(RuntimeType __instance, ref string? __result, out FullNameState __state)
 			{
-				ref var cache = ref TypeFullNameCache.GetOrAddReference(__instance.TypeHandle);
+				__state = default;
+				if (_fullNameRecursionDepth != 0)
+					return true;
 
-				if (!cache.Cached && !TryGetFromCentralCache(__instance, ref cache))
-					return __state = true;
+				__state.ReleaseGuard = true;
+				_fullNameRecursionDepth++;
+
+				var cache = TypeFullNameCache.GetOrAddReference(__instance.TypeHandle);
+				var fetchedFromCentralCache = false;
+				if (!cache.Cached)
+				{
+					fetchedFromCentralCache = TryGetFromCentralCache(__instance, out cache);
+					if (!fetchedFromCentralCache)
+					{
+						__state.ShouldStore = true;
+						return true;
+					}
+				}
+
+				if (fetchedFromCentralCache)
+					TypeFullNameCache.GetExistingReference(__instance.TypeHandle) = cache;
 
 				__result = cache.Name;
-				return __state = false;
+				return false;
 			}
 
 			[MethodImpl(MethodImplOptions.NoInlining)]
 			private static bool TryGetFromCentralCache(RuntimeType instance,
-				ref TypeFullNameCacheValue cache)
+				out TypeFullNameCacheValue cache)
 			{
 				lock (_lock)
 				{
-					ref var centralCache
-						= ref TypeFullNameCache.GetDirectly.GetOrAddReference(instance.TypeHandle);
-					cache.Name = centralCache.Name;
+					cache = TypeFullNameCache.GetDirectly.GetOrAddReference(instance.TypeHandle);
+					if (!cache.Cached)
+						return false;
 				}
 
-				return cache.Cached;
+				return true;
 			}
 
 			[MethodImpl(MethodImplOptions.AggressiveInlining)]
-			public static void Postfix(RuntimeType __instance, string? __result, bool __state)
+			public static void Postfix(RuntimeType __instance, string? __result, FullNameState __state)
 			{
-				if (!__state)
+				if (!__state.ShouldStore)
 					return;
 
 				UpdateCache(__instance, __result);
 			}
 
+			[MethodImpl(MethodImplOptions.AggressiveInlining)]
+			public static Exception? Finalizer(Exception? __exception, ref FullNameState __state)
+			{
+				if (__state.ReleaseGuard)
+					_fullNameRecursionDepth--;
+
+				return __exception;
+			}
+
 			[MethodImpl(MethodImplOptions.NoInlining)]
 			private static void UpdateCache(RuntimeType __instance, string? __result)
 			{
-				ref var cache = ref TypeFullNameCache.GetExistingReference(__instance.TypeHandle);
-				cache.Name = __result;
+				var cache = new TypeFullNameCacheValue
+				{
+					Cached = true,
+					Name = __result
+				};
+				TypeFullNameCache.GetExistingReference(__instance.TypeHandle) = cache;
 				
 				lock (_lock)
-				{
-					ref var centralCache
-						= ref TypeFullNameCache.GetDirectly.GetReference(__instance.TypeHandle);
-					centralCache.Name = __result;
-				}
+					TypeFullNameCache.GetDirectly.GetOrAddReference(__instance.TypeHandle) = cache;
 			}
 
+			[ThreadStatic]
+			private static int _fullNameRecursionDepth;
+
 			private static object _lock = new();
 		}
 
@@ -474,24 +505,16 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 			public PropertyInfo? Info;
 		}
 
-		public record struct TypeFullNameCacheValue()
+		public record struct FullNameState
 		{
-			private object? _value = typeof(void);
-
-			public string? Name
-			{
-				[MethodImpl(MethodImplOptions.AggressiveInlining)]
-				get => Unsafe.As<string?>(_value);
-				
-				[MethodImpl(MethodImplOptions.AggressiveInlining)]
-				set => _value = value;
+			public bool ReleaseGuard;
+			public bool ShouldStore;
 		}
 
-			public bool Cached
+		public record struct TypeFullNameCacheValue
 		{
-				[MethodImpl(MethodImplOptions.AggressiveInlining)]
-				get => _value is not MemberInfo;
-			}
+			public bool Cached;
+			public string? Name;
 		}
 	}
 
@@ -499,6 +522,8 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 	{
 		public sealed class GetCustomAttributes : FishPatch
 		{
+			public override bool DefaultState => true;
+
 			public override string? Description { get; }
 				= "Caches attributes for reflection lookups. Decent load time improvement.";
 
@@ -510,45 +535,165 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 			public static bool Prefix(ICustomAttributeProvider obj, Type attributeType, bool inherit,
 				out object[]? __result, out CustomAttributeState __state)
 			{
-				var key = new CustomAttributeCache(obj, (__state.AttributeType = attributeType).TypeHandle,
-					__state.Inherit = inherit);
+				var key = new CustomAttributeCache(obj, attributeType.TypeHandle, inherit);
+				__state = new() { Key = key };
 
-				ref var cache = ref CustomAttributeCache.GetOrAddReference(in key);
-				if (cache.Attributes is null)
-					TryGetFromCentralCache(ref key, ref cache);
+				var cacheLookup = TryGetCachedAttributes(ref key, out __result);
 
-				return __state.State = (__result = cache.Attributes) is null;
+				if (cacheLookup == CustomAttributeCacheLookup.Hit)
+					return false;
+
+				if (cacheLookup == CustomAttributeCacheLookup.InProgress)
+				{
+					__result = null;
+					return true;
+				}
+
+				MarkInProgress(ref key);
+				__state.ShouldStore = true;
+				__result = null;
+				return true;
 			}
 
 			[MethodImpl(MethodImplOptions.NoInlining)]
-			private static void TryGetFromCentralCache(ref CustomAttributeCache key,
-				ref CustomAttributeCacheValue cache)
+			private static CustomAttributeCacheLookup TryGetCachedAttributes(ref CustomAttributeCache key,
+				out object[]? result)
 			{
+				var localLookup = TryUseCache(CustomAttributeCache.Get, ref key, out result);
+				if (localLookup == CustomAttributeCacheLookup.Hit)
+				{
+					result = CopyCachedAttributes(result!);
+					return CustomAttributeCacheLookup.Hit;
+				}
+
+				if (localLookup == CustomAttributeCacheLookup.InProgress)
+					return localLookup;
+
 				lock (_lock)
-					cache.Attributes = CustomAttributeCache.GetDirectly.GetOrAdd(ref key).Attributes;
+				{
+					var centralLookup = TryUseCache(CustomAttributeCache.GetDirectly, ref key, out var centralResult);
+					if (centralLookup == CustomAttributeCacheLookup.Hit)
+					{
+						result = CopyCachedAttributes(centralResult!);
+						CustomAttributeCache.Get[key] = new()
+						{
+							Attributes = centralResult,
+							Status = CustomAttributeCacheStatus.Completed
+						};
+						return CustomAttributeCacheLookup.Hit;
+					}
+
+					if (centralLookup == CustomAttributeCacheLookup.InProgress)
+						return CustomAttributeCacheLookup.InProgress;
+				}
+
+				result = null;
+				return CustomAttributeCacheLookup.Miss;
 			}
 
 			[MethodImpl(MethodImplOptions.AggressiveInlining)]
 			public static void Postfix(ICustomAttributeProvider obj, object[]? __result,
-				in CustomAttributeState __state)
+				ref CustomAttributeState __state)
 			{
-				if (!__state.State || __result is null)
+				if (!__state.ShouldStore || __result is null)
 					return;
 
-				UpdateCache(obj, __state, __result);
+				StoreCompleted(ref __state.Key, __result);
 			}
 
 			[MethodImpl(MethodImplOptions.NoInlining)]
-			private static void UpdateCache(ICustomAttributeProvider obj, in CustomAttributeState __state,
-				object[]? __result)
+			public static Exception? Finalizer(Exception? __exception, ref CustomAttributeState __state)
 			{
-				var key = new CustomAttributeCache(obj, __state.AttributeType.TypeHandle, __state.Inherit);
+				if (__state.ShouldStore && __exception != null)
+					ClearInProgress(ref __state.Key);
 
-				CustomAttributeCache.GetExistingReference(in key).Attributes = __result;
+				return __exception;
+			}
+
+			[MethodImpl(MethodImplOptions.NoInlining)]
+			private static CustomAttributeCacheLookup TryUseCache(
+				Dictionary<CustomAttributeCache, CustomAttributeCacheValue> cache,
+				ref CustomAttributeCache key, out object[]? result)
+			{
+				if (!cache.TryGetValue(key, out var value))
+				{
+					result = null;
+					return CustomAttributeCacheLookup.Miss;
+				}
+
+				switch (value.Status)
+				{
+				case CustomAttributeCacheStatus.Completed:
+					result = value.Attributes;
+					return CustomAttributeCacheLookup.Hit;
+				case CustomAttributeCacheStatus.InProgress:
+					LogInProgress(ref key);
+					result = null;
+					return CustomAttributeCacheLookup.InProgress;
+				default:
+					result = null;
+					return CustomAttributeCacheLookup.Miss;
+				}
+			}
+
+			[MethodImpl(MethodImplOptions.NoInlining)]
+			private static void MarkInProgress(ref CustomAttributeCache key)
+			{
+				var value = new CustomAttributeCacheValue
+				{
+					Status = CustomAttributeCacheStatus.InProgress
+				};
 
 				lock (_lock)
-					CustomAttributeCache.GetDirectly.GetReference(ref key).Attributes = __result;
+				{
+					CustomAttributeCache.Get[key] = value;
+					CustomAttributeCache.GetDirectly[key] = value;
 				}
+			}
+
+			[MethodImpl(MethodImplOptions.NoInlining)]
+			private static void StoreCompleted(ref CustomAttributeCache key, object[] result)
+			{
+				var value = new CustomAttributeCacheValue
+				{
+					Attributes = CopyCachedAttributes(result),
+					Status = CustomAttributeCacheStatus.Completed
+				};
+
+				lock (_lock)
+				{
+					CustomAttributeCache.Get[key] = value;
+					CustomAttributeCache.GetDirectly[key] = value;
+				}
+			}
+
+			[MethodImpl(MethodImplOptions.NoInlining)]
+			private static void ClearInProgress(ref CustomAttributeCache key)
+			{
+				lock (_lock)
+				{
+					if (CustomAttributeCache.Get.TryGetValue(key, out var localValue)
+						&& localValue.Status == CustomAttributeCacheStatus.InProgress)
+					{
+						CustomAttributeCache.Get.Remove(key);
+					}
+
+					if (CustomAttributeCache.GetDirectly.TryGetValue(key, out var centralValue)
+						&& centralValue.Status == CustomAttributeCacheStatus.InProgress)
+					{
+						CustomAttributeCache.GetDirectly.Remove(key);
+					}
+				}
+			}
+
+			[MethodImpl(MethodImplOptions.NoInlining)]
+			private static void LogInProgress(ref CustomAttributeCache _)
+			{
+			}
+
+			[MethodImpl(MethodImplOptions.AggressiveInlining)]
+			private static object[] CopyCachedAttributes(object[] attributes)
+				=> attributes.Length != 0 ? (object[])attributes.Clone() : Array.Empty<object>();
 
 			private static object _lock = new();
 		}
@@ -556,12 +701,27 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 		public record struct CustomAttributeCacheValue
 		{
 			public object[]? Attributes;
+			public CustomAttributeCacheStatus Status;
 		}
 
 		public record struct CustomAttributeState
 		{
-			public bool State, Inherit;
-			public Type AttributeType;
+			public bool ShouldStore;
+			public CustomAttributeCache Key;
+		}
+
+		public enum CustomAttributeCacheStatus : byte
+		{
+			Uninitialized,
+			InProgress,
+			Completed
+		}
+
+		private enum CustomAttributeCacheLookup : byte
+		{
+			Miss,
+			Hit,
+			InProgress
 		}
 	}
 
@@ -577,8 +737,12 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 			Guard.IsNotNull(array);
 			Guard.IsLessThanOrEqualTo(array.Length, byte.MaxValue);
 			Array = array;
-			var length = array.Length;
-			_hashCode = HashCode.Combine(length, length > 0 && Array[0] is { } item ? item.GetHashCode() : 0);
+			var hashCode = array.Length;
+
+			for (var i = 0; i < array.Length; i++)
+				hashCode = global::System.HashCode.Combine(hashCode, array[i]);
+
+			_hashCode = hashCode;
 		}
 
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -587,13 +751,16 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 			if (Array is null)
 				return other.Array is null;
 
+			if (_hashCode != other._hashCode)
+				return false;
+
 			if (other.Array is null || Array.Length != other.Array.Length)
 				return false;
 
 			var length = Array.Length;
 			for (var i = 0; i < length; i++)
 			{
-				if (!Array[i].Equals(other.Array![i]))
+				if (!EqualityComparer<T>.Default.Equals(Array[i], other.Array[i]))
 					return false;
 			}
 
@@ -608,6 +775,8 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 	{
 		public sealed class CreateInstance_Type : FishPatch
 		{
+			public override bool DefaultState => true;
+
 			public override List<string> IncompatibleModIDs { get; } = [PackageIDs.MULTIPLAYER];
 
 			public override string? Description { get; }
@@ -619,21 +788,94 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 			[MethodImpl(MethodImplOptions.AggressiveInlining)]
 			public static bool Prefix(Type? type, ref object __result)
 			{
-				if (type is null)
+				if (type is not RuntimeType runtimeType)
 					return true;
 
-				ref var cache = ref ActivatorCache.GetOrAddReference(type.TypeHandle);
+				ref var cache = ref ActivatorCache.GetOrAddReference(runtimeType.TypeHandle);
+
+				if (ReferenceEquals(cache.Result, _unsupportedActivatorSentinel))
+					return true;
+
+				if (cache.Result is not null)
+					return TryInvoke(ref __result, cache.Result);
+
+				if (!CanUseFastPath(runtimeType))
+					return MarkUnsupported(runtimeType, ref cache);
 				
 				if (cache.Dirty
-					&& !ActivatorCache.UpdateAsyncCache<ActivatorCacheValue, Type, Func<object>>(ref cache,
-						type.TypeHandle, type))
+					&& !ActivatorCache.UpdateAsyncCache<ActivatorCacheValue, RuntimeType, Func<object>>(ref cache,
+						runtimeType.TypeHandle, runtimeType))
 				{
 					return true;
 				}
 
+				try
+				{
 					__result = cache.Result!();
 					return false;
 				}
+				catch (OverflowException)
+				{
+					throw;
+				}
+				catch (Exception ex)
+				{
+					throw new TargetInvocationException(ex);
+				}
+			}
+
+			[MethodImpl(MethodImplOptions.NoInlining)]
+			private static bool MarkUnsupported(RuntimeType type, ref ActivatorCacheValue cache)
+			{
+				cache.Result = _unsupportedActivatorSentinel;
+
+				lock (ActivatorCache.SyncLock)
+					ActivatorCache.GetDirectly.GetOrAddReference(type.TypeHandle).Result = _unsupportedActivatorSentinel;
+
+				return true;
+			}
+
+			[MethodImpl(MethodImplOptions.NoInlining)]
+			private static bool TryInvoke(ref object __result, Func<object> activator)
+			{
+				try
+				{
+					__result = activator();
+					return false;
+				}
+				catch (OverflowException)
+				{
+					throw;
+				}
+				catch (Exception ex)
+				{
+					throw new TargetInvocationException(ex);
+				}
+			}
+
+			[MethodImpl(MethodImplOptions.AggressiveInlining)]
+			private static bool CanUseFastPath(RuntimeType type)
+			{
+				if (type.HasElementType
+					|| type.ContainsGenericParameters
+					|| type.IsInterface
+					|| type.IsAbstract
+					|| type.IsCOMObject
+					|| type == typeof(void)
+					|| type == typeof(TypedReference)
+					|| type == typeof(ArgIterator)
+					|| type == typeof(RuntimeArgumentHandle))
+				{
+					return false;
+				}
+
+				return type.IsValueType
+					|| type.GetConstructor(BindingFlags.Instance | BindingFlags.Public, null, Type.EmptyTypes, null)
+					is not null;
+			}
+
+			private static readonly Func<object> _unsupportedActivatorSentinel
+				= static () => throw new InvalidOperationException("Unsupported activator sentinel");
 		}
 
 		// public sealed class CreateInstance_Type_Args : FishPatch
@@ -642,14 +884,34 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 		// 		= (Func<Type, object[], object>)Activator.CreateInstance;
 		// }
 
-		public record struct ActivatorCacheValue : IAsyncCacheable<RuntimeTypeHandle, Type, Func<object>>
+		public record struct ActivatorCacheValue : IAsyncCacheable<RuntimeTypeHandle, RuntimeType, Func<object>>
 		{
 			public Func<object>? Result { get; set; }
 			public Task<Func<object>>? Task { get; set; }
 			public bool Dirty => Result == null;
 
-			public ValueTask<Func<object>?> MakeResultAsync(RuntimeTypeHandle key, Type type)
-				=> new(Reflection.CreateConstructorDelegate<Func<object>>(type));
+			public ValueTask<Func<object>?> MakeResultAsync(RuntimeTypeHandle key, RuntimeType type)
+				=> new(MakeActivatorDelegate(type));
+
+			[MethodImpl(MethodImplOptions.NoInlining)]
+			private static Func<object>? MakeActivatorDelegate(RuntimeType type)
+			{
+				if (type.IsValueType)
+					return Reflection.CreateConstructorDelegate<Func<object>>(type);
+
+				var constructor = type.GetConstructor(BindingFlags.Instance | BindingFlags.Public, null,
+					Type.EmptyTypes, null);
+
+				if (constructor is null)
+					return null;
+
+				var dynamicMethod = new DynamicMethod($"Activator_{type.Name}", typeof(object), Type.EmptyTypes,
+					type, true);
+				var il = dynamicMethod.GetILGenerator();
+				il.Emit(FishTranspiler.New(constructor));
+				il.Emit(FishTranspiler.Return);
+				return (Func<object>)dynamicMethod.CreateDelegate(typeof(Func<object>));
+			}
 		}
 
 		// public record struct ActivatorWithArgumentsCacheValue : IAsyncCacheable<ActivatorWithArgumentsCache, Type,
@@ -739,6 +1001,8 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 	{
 		public sealed class GetValue_Patch : FishPatch
 		{
+			public override bool DefaultState => true;
+
 			public override string Description { get; }
 				= "Optimizes the GetValue method by invoking it through specialized cached delegates";
 
@@ -751,12 +1015,17 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 			//	Log.Message(types.ToStringSafeEnumerable());
 			//}
 
-			public override MethodBase TargetMethodInfo { get; }
-				= AccessTools.DeclaredMethod(typeof(MonoField), nameof(MonoField.GetValue))!;
+			public override MethodBase? TargetMethodInfo { get; }
+				= AccessTools.DeclaredMethod(
+					AccessTools.TypeByName("System.Reflection.RuntimeFieldInfo")
+					?? AccessTools.TypeByName("System.Reflection.MonoField"),
+					nameof(FieldInfo.GetValue), [typeof(object)]);
 
 			[MethodImpl(MethodImplOptions.AggressiveInlining)]
 			public static bool Prefix(FieldInfo __instance, object? obj, ref object? __result)
 			{
+				ValidateGetValueCall(__instance, obj);
+
 				ref var cache = ref FieldGetters.GetOrAddReference(__instance.FieldHandle);
 
 				if (cache.Dirty
@@ -769,10 +1038,36 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 				__result = cache.Result!(obj);
 				return false;
 			}
+
+			[MethodImpl(MethodImplOptions.NoInlining)]
+			private static void ValidateGetValueCall(FieldInfo info, object? obj)
+			{
+				if (!info.IsStatic)
+				{
+					if (obj is null)
+						throw new TargetException("Non-static field requires a target");
+
+					var declaringType = info.DeclaringType!;
+					if (!declaringType.IsAssignableFrom(obj.GetType()))
+					{
+						throw new ArgumentException(
+							$"Field {info.Name} defined on type {declaringType} is not a field on the target object which is of type {obj.GetType()}.",
+							nameof(obj));
+					}
+				}
+
+				if (!info.IsLiteral && info.DeclaringType!.ContainsGenericParameters)
+				{
+					throw new InvalidOperationException(
+						"Late bound operations cannot be performed on fields with types for which Type.ContainsGenericParameters is true.");
+				}
+			}
 		}
 
 		public sealed class SetValue_Patch : FishPatch
 		{
+			public override bool DefaultState => false;
+
 			public override string Description { get; }
 				= "Optimizes the SetValue method by invoking it through specialized cached delegates";
 
@@ -794,14 +1089,20 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 
 			[MethodImpl(MethodImplOptions.NoInlining)]
 			private static bool TryUpdate(FieldInfo __instance, ref FieldInfoSetterCache cache)
-				=> cache.Task != _fieldSetterFailureTask && __instance.IsConst()
-					? ErrorForInvalidCallAttempt(__instance, ref cache)
-					: FieldSetters.UpdateAsyncCache<FieldInfoSetterCache, FieldInfo, FieldSetter>(ref cache,
+			{
+				if (__instance.IsConst())
+					return ErrorForInvalidCallAttempt(__instance, ref cache);
+
+				return FieldSetters.UpdateAsyncCache<FieldInfoSetterCache, FieldInfo, FieldSetter>(ref cache,
 						__instance.FieldHandle, __instance);
+			}
 
 			[MethodImpl(MethodImplOptions.NoInlining)]
 			private static bool ErrorForInvalidCallAttempt(FieldInfo info, ref FieldInfoSetterCache cache)
 			{
+				if (cache.Task == _fieldSetterFailureTask)
+					return false;
+
 				cache.Task = _fieldSetterFailureTask;
 				Log.Error($"FieldInfo.SetValue has been called on '{
 					info.FullDescription()}'. This is a const that gets copied at compile time. An attempt at "
@@ -811,7 +1112,7 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 			}
 		}
 
-		private static Task<FieldSetter> _fieldSetterFailureTask = new(static () => null!);
+		private static Task<FieldSetter> _fieldSetterFailureTask = new(static () => null!); // sentinel only
 
 		public static FieldGetter? MakeGetterDelegate(FieldInfo info)
 		{
@@ -984,13 +1285,15 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 				if (methodInfo is null && constructorInfo is null)
 					return null;
 
+				var parameters = methodBase.GetParameters();
+				if (!CanCacheInvoke(methodBase, methodInfo, constructorInfo, parameters))
+					return null;
+
 				var dm = new DynamicMethod($"MethodInvoker_{methodBase.Name}", typeof(object),
 					[typeof(object), typeof(object[])],
 					GetOwnerType(methodBase), true);
 				var il = dm.GetILGenerator();
 
-				var parameters = methodBase.GetParameters();
-
 				if (methodInfo != null && !methodBase.IsStatic)
 					EmitInstanceArgument(il, methodBase);
 
@@ -1025,6 +1328,49 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 			}
 		}
 
+		private static bool CanCacheInvoke(MethodBase methodBase, MethodInfo? methodInfo,
+			ConstructorInfo? constructorInfo, ParameterInfo[] parameters)
+		{
+			if (methodBase.ContainsGenericParameters
+				|| (methodBase.CallingConvention & CallingConventions.VarArgs) != 0)
+			{
+				return false;
+			}
+
+			if (methodInfo != null && !IsSupportedInvokeType(methodInfo.ReturnType))
+				return false;
+
+			if (constructorInfo?.DeclaringType is { } declaringType
+				&& !IsSupportedInvokeType(declaringType))
+			{
+				return false;
+			}
+
+			for (var i = 0; i < parameters.Length; i++)
+			{
+				if (!IsSupportedInvokeParameter(parameters[i].ParameterType))
+					return false;
+			}
+
+			return true;
+		}
+
+		private static bool IsSupportedInvokeParameter(Type parameterType)
+		{
+			// object[] stores nullable value arguments as boxed T or null, not boxed Nullable<T>, so the
+			// current byref fast path cannot safely hand out a Nullable<T>&.
+			if (parameterType.IsByRef && parameterType.GetElementType()!.IsNullable())
+				return false;
+
+			if (parameterType.IsByRef)
+				parameterType = parameterType.GetElementType()!;
+
+			return IsSupportedInvokeType(parameterType);
+		}
+
+		private static bool IsSupportedInvokeType(Type type)
+			=> !type.IsPointer && !type.ContainsGenericParameters;
+
 		private static void EmitInvokeMethodCall(MethodBase methodBase, ILGenerator il, MethodInfo methodInfo)
 		{
 			il.Emit(FishTranspiler.Call(methodBase));
@@ -1119,7 +1465,7 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[SecuritySafeCritical]
-	public static ref TTo CastRefSafely<TTo>(ref object? from)
+	public static ref TTo CastRefSafely<TTo>(ref object? from) where TTo : class?
 		=> ref from is TTo or null
 			? ref Unsafe.As<object?, TTo>(ref from)
 			: ref ThrowInvalidCastException<TTo>();
@@ -1131,7 +1477,7 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 			? ref Unsafe.Unbox<TTo>(from)
 			: ref Unsafe.Unbox<TTo>(from
 				= from is null
-					? default
+					? default(TTo)
 					: FisheryLib.Convert.Type<object, TTo>(from));
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]

Source/PerformanceFish/Utility/CellIndexExtensions.cs

@@ -12,7 +12,7 @@ public static class CellIndexExtensions
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static int CellToIndex(this in IntVec3 cell, CellIndices cellIndices)
-		=> cell.CellToIndex(cellIndices.mapSizeX);
+		=> cell.CellToIndex(GetMapSizeX(cellIndices));
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static int CellToIndex(this in IntVec3 cell, int mapSizeX) => (cell.z * mapSizeX) + cell.x;
@@ -22,7 +22,7 @@ public static class CellIndexExtensions
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static int CellToIndex(this IntVec2 cell, CellIndices cellIndices)
-		=> cell.CellToIndex(cellIndices.mapSizeX);
+		=> cell.CellToIndex(GetMapSizeX(cellIndices));
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static int CellToIndex(this IntVec2 cell, int mapSizeX) => (cell.z * mapSizeX) + cell.x;
@@ -31,7 +31,7 @@ public static class CellIndexExtensions
 	public static int CellToIndex(int x, int z, Map map) => CellToIndex(x, z, map.cellIndices);
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
-	public static int CellToIndex(int x, int z, CellIndices cellIndices) => CellToIndex(x, z, cellIndices.mapSizeX);
+	public static int CellToIndex(int x, int z, CellIndices cellIndices) => CellToIndex(x, z, GetMapSizeX(cellIndices));
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static int CellToIndex(int x, int z, int mapSizeX) => (z * mapSizeX) + x;
@@ -41,11 +41,24 @@ public static class CellIndexExtensions
 		=> thingGrid.thingGrid[cellIndex.Value];
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
-	public static bool IsFogged(this FogGrid fogGrid, CellIndex cellIndex) => fogGrid.fogGrid[cellIndex.Value];
+	public static bool IsFogged(this FogGrid fogGrid, CellIndex cellIndex)
+#if V1_6
+		=> fogGrid.fogGrid.IsSet(cellIndex.Value);
+#else
+		=> fogGrid.fogGrid[cellIndex.Value];
+#endif
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static float GetDepth(this SnowGrid snowGrid, CellIndex cellIndex) => snowGrid.depthGrid[cellIndex.Value];
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static float GetDepth(this SnowGrid snowGrid, int cellIndex) => snowGrid.depthGrid[cellIndex];
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	private static int GetMapSizeX(CellIndices cellIndices)
+#if V1_6
+		=> cellIndices.SizeX;
+#else
+		=> cellIndices.mapSizeX;
+#endif
 }

Source/PerformanceFish/Utility/MiscExtensions.cs

@@ -97,11 +97,14 @@ public static class MiscExtensions
 	}
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
-	public static int SizeX(this Map map) => map.cellIndices.mapSizeX;
+	public static int SizeX(this Map map) => map.Size.x;
 
 	public static Map? TryGetMapHeld(this Thing thing)
 	{
-		var maps = Current.Game.Maps;
+		var maps = Find.Maps;
+		if (maps == null)
+			return thing.ParentHolder is { } rootHolder ? ThingOwnerUtility.GetRootMap(rootHolder) : null;
+
 		var mapIndex = (uint)thing.mapIndexOrState;
 
 		return mapIndex < (uint)maps.Count
@@ -114,7 +117,10 @@ public static class MiscExtensions
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static Map? TryGetMap(this Thing thing)
 	{
-		var maps = Current.Game.Maps;
+		var maps = Find.Maps;
+		if (maps == null)
+			return null;
+
 		var mapIndex = (uint)thing.mapIndexOrState;
 		
 		return mapIndex < (uint)maps.Count ? maps[(int)mapIndex] : null;
@@ -127,18 +133,37 @@ public static class MiscExtensions
 	public static Map GetMap(this Region region) => Current.Game.Maps[region.mapIndex];
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
-	public static bool IsSpawned(this Thing thing) => (uint)thing.mapIndexOrState < (uint)Current.Game.Maps.Count;
+	public static bool IsSpawned(this Thing thing)
+	{
+		var maps = Find.Maps;
+		if (thing.mapIndexOrState < 0 || maps == null)
+			return false;
+
+		if (thing.mapIndexOrState < maps.Count)
+			return true;
+
+		Verse.Log.ErrorOnce($"Thing {thing.ThingID} is associated with invalid map index {thing.mapIndexOrState}", 64664487);
+		return false;
+	}
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static int GetLoadID(this Bill bill) => bill.loadID;
 
 	public static void InvokeWhenCellIndicesReady(this Map map, Action<Map> action)
 	{
+#if V1_6
+		if (map.cellIndices.NumGridCells > 0)
+#else
 		if (map.cellIndices != null)
+#endif
+		{
 			action(map);
+		}
 		else
+		{
 			map.Events().ComponentsConstructed += action;
 		}
+	}
 	
 	public static void AddLetterSilently(this LetterStack letterStack, Letter letter, Color color, bool playSound = false,
 		string? debugInfo = null)

Source/PerformanceFish/UtilityPrepatches.cs

@@ -26,6 +26,9 @@ public sealed class UtilityPrepatches : ClassWithFishPrepatches
 
 		public override MethodBase TargetMethodBase { get; } = methodof(LoadedModManager.CreateModClasses);
 
+		public override void Transpiler(ILProcessor ilProcessor, ModuleDefinition module)
+			=> ilProcessor.ReplaceBodyWith(ReplacementBody);
+
 		public static void Prefix()
 		{
 			try
@@ -37,6 +40,59 @@ public sealed class UtilityPrepatches : ClassWithFishPrepatches
 				Log.Error($"Exception caught within OnAssembliesLoaded:\n{e}\n{new StackTrace(true)}");
 			}
 		}
+
+		public static void ReplacementBody()
+		{
+			var runningModClasses = RunningModClasses;
+			var assemblyToModContentPack = BuildAssemblyToModContentPackMap();
+
+			foreach (var type in typeof(Mod).InstantiableDescendantsAndSelf())
+			{
+				if (type is null)
+					continue;
+
+				DeepProfiler.Start("Loading " + type?.ToString() + " mod class");
+				try
+				{
+					if (!runningModClasses.ContainsKey(type))
+					{
+						assemblyToModContentPack.TryGetValue(type.Assembly, out var modContentPack);
+						runningModClasses[type] = (Mod)Activator.CreateInstance(type, modContentPack);
+					}
+				}
+				catch (Exception ex)
+				{
+					Log.Error("Error while instantiating a mod of type " + type?.ToString() + ": " + ex);
+				}
+				finally
+				{
+					DeepProfiler.End();
+				}
+			}
+		}
+
+		private static Dictionary<Assembly, ModContentPack> BuildAssemblyToModContentPackMap()
+		{
+			var runningMods = LoadedModManager.RunningModsListForReading;
+			var assemblyToModContentPack = new Dictionary<Assembly, ModContentPack>();
+
+			for (var i = 0; i < runningMods.Count; i++)
+			{
+				var modContentPack = runningMods[i];
+				var loadedAssemblies = modContentPack.assemblies.loadedAssemblies;
+
+				for (var j = 0; j < loadedAssemblies.Count; j++)
+					assemblyToModContentPack.TryAdd(loadedAssemblies[j], modContentPack);
+			}
+
+			return assemblyToModContentPack;
+		}
+
+		private static Dictionary<Type, Mod> RunningModClasses
+			=> (Dictionary<Type, Mod>)(_runningModClassesField ??=
+				AccessTools.Field(typeof(LoadedModManager), "runningModClasses")).GetValue(null)!;
+
+		private static FieldInfo? _runningModClassesField;
 	}
 
 	public sealed class NoSteamLogWarning : FishPrepatch