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/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/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 +94,14 @@ 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)
+			=> type == typeof(Gene)
+				|| type.GetMethod(nameof(Gene.Tick), global::System.Reflection.BindingFlags.Instance
+					| global::System.Reflection.BindingFlags.Public
+					| global::System.Reflection.BindingFlags.NonPublic
+					| global::System.Reflection.BindingFlags.DeclaredOnly, null, Type.EmptyTypes, null) == null;
 	}
 }

Source/PerformanceFish/GlobalUsings.cs

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

Source/PerformanceFish/Listers/Buildings.cs

@@ -237,6 +237,11 @@ 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)
@@ -290,6 +295,11 @@ 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)

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

@@ -568,9 +568,25 @@ 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/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/OnAssembliesLoaded.cs

@@ -50,7 +50,9 @@ public static class OnAssembliesLoaded
 			try
 			{
 				if (!patchClass.RequiresLoadedGameForPatching)
+				{
 					patchClass.Patches.PatchAll();
+				}
 			}
 			catch (Exception ex)
 			{

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 +15,9 @@ public sealed class WorldObjectsOptimization : ClassWithFishPrepatches
 {
 	public sealed class WorldObjectsHolderTickPatch : FishPrepatch
 	{
+		private static FishTable<Type, bool> _skippableCompTypes = null!;
+		private static FishTable<Type, bool> _skippableWorldObjectTypes = null!;
+
 		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 +38,11 @@ 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 +57,7 @@ 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))
 				{
@@ -64,6 +71,15 @@ public sealed class WorldObjectsOptimization : ClassWithFishPrepatches
 			CachedMapsVersion = Current.gameInt.maps._version;
 		}
 
+		private static bool CanSkipWorldObjectTick(WorldObject worldObject)
+		{
+#if V1_6
+			if (worldObject is IThingHolder)
+				return false;
+#endif
+			return IsSkippableWorldObjectType(worldObject.GetType());
+		}
+
 		private static bool CanSkipCompTick(WorldObject worldObject)
 		{
 			var comps = worldObject.comps;
@@ -74,7 +90,7 @@ 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();
@@ -106,28 +122,69 @@ 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 +192,12 @@ 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/Rendering/DynamicDrawManagerPatches.cs

@@ -68,40 +68,79 @@ 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
 				{
-					if (currentViewRect.Contains(position)
-						|| currentViewRect.Overlaps(drawThing.OccupiedDrawRect()))
-					{
-						ThingsToDraw.Add(drawThing);
+					continue;
+				}
 
-						if (!DebugViewSettings.singleThreadedDrawing)
-							EnsureInitialized(drawThing);
-					}
-					else if (drawThing is Pawn pawn && checkShadows && shadowViewRect.Contains(drawThing.Position))
-					{
-						PawnShadowsToDraw.Add(pawn);
-					}
+				if (currentViewRect.Contains(position)
+					|| currentViewRect.Overlaps(drawThing.OccupiedDrawRect()))
+				{
+					ThingsToDraw.Add(drawThing);
+					
+					if (!DebugViewSettings.singleThreadedDrawing)
+						EnsureInitialized(drawThing);
+				}
+				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)
 		{
 			try

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

@@ -510,44 +510,139 @@ 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);
+				if (TryGetCachedAttributes(ref key, out __result))
+					return false;
 
-				return __state.State = (__result = cache.Attributes) is null;
+				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 bool TryGetCachedAttributes(ref CustomAttributeCache key, out object[]? result)
 			{
 				lock (_lock)
-					cache.Attributes = CustomAttributeCache.GetDirectly.GetOrAdd(ref key).Attributes;
+				{
+					if (TryUseCache(CustomAttributeCache.Get, ref key, out result))
+						return true;
+
+					if (TryUseCache(CustomAttributeCache.GetDirectly, ref key, out var centralResult))
+					{
+						result = centralResult;
+						CustomAttributeCache.Get[key] = new()
+						{
+							Attributes = centralResult,
+							Status = CustomAttributeCacheStatus.Completed
+						};
+						return true;
+					}
+				}
+
+				result = null;
+				return false;
 			}
 
 			[MethodImpl(MethodImplOptions.AggressiveInlining)]
 			public static void Postfix(ICustomAttributeProvider obj, object[]? __result,
 				in CustomAttributeState __state)
 			{
-				if (!__state.State || __result is null)
+				if (!__state.ShouldStore || __result is null)
 					return;
 
-				UpdateCache(obj, __state, __result);
+				StoreCompleted(ref Unsafe.AsRef(in __state.Key), __result);
 			}
 
 			[MethodImpl(MethodImplOptions.NoInlining)]
-			private static void UpdateCache(ICustomAttributeProvider obj, in CustomAttributeState __state,
-				object[]? __result)
+			public static Exception? Finalizer(Exception? __exception, in CustomAttributeState __state)
 			{
-				var key = new CustomAttributeCache(obj, __state.AttributeType.TypeHandle, __state.Inherit);
+				if (__state.ShouldStore && __exception != null)
+					ClearInProgress(ref Unsafe.AsRef(in __state.Key));
 
-				CustomAttributeCache.GetExistingReference(in key).Attributes = __result;
+				return __exception;
+			}
+
+			[MethodImpl(MethodImplOptions.NoInlining)]
+			private static bool TryUseCache(Dictionary<CustomAttributeCache, CustomAttributeCacheValue> cache,
+				ref CustomAttributeCache key, out object[]? result)
+			{
+				if (!cache.TryGetValue(key, out var value))
+				{
+					result = null;
+					return false;
+				}
+
+				switch (value.Status)
+				{
+				case CustomAttributeCacheStatus.Completed:
+					result = value.Attributes;
+					return true;
+				case CustomAttributeCacheStatus.InProgress:
+					LogInProgress(ref key);
+					result = null;
+					return false;
+				default:
+					result = null;
+					return false;
+				}
+			}
+
+			[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 = 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 _)
+			{
 			}
 
 			private static object _lock = new();
@@ -556,12 +651,20 @@ 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
 		}
 	}
 
@@ -752,7 +855,8 @@ public sealed class ReflectionCaching : ClassWithFishPatches
 			//}
 
 			public override MethodBase TargetMethodInfo { get; }
-				= AccessTools.DeclaredMethod(typeof(MonoField), nameof(MonoField.GetValue))!;
+				= AccessTools.DeclaredMethod(AccessTools.TypeByName("System.Reflection.RuntimeFieldInfo"),
+					nameof(FieldInfo.GetValue), [typeof(object)])!;
 
 			[MethodImpl(MethodImplOptions.AggressiveInlining)]
 			public static bool Prefix(FieldInfo __instance, object? obj, ref object? __result)

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

@@ -97,7 +97,7 @@ 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)
 	{
@@ -134,10 +134,18 @@ public static class MiscExtensions
 
 	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,