Lots of new optimizations utilizing prepatcher

To start, this mod now requires Prepatcher and Fishery.
New optimizations include: gene ticking improvements, world object improvements, hediff optimizations, world pawn gc optimizations, better mothballing, dds support, ContentFinder caching, additions and changes to reflection caching, as well as various other additions. Multiplayer support has been improved too, but should be considered highly experimental. The WorkGiver_DoBill bug is fixed in this build. Multiple patches aiming to improve RimWorld's load time have been added too.

Source/PerformanceFish/ContentFinderCaching.cs

@@ -0,0 +1,53 @@
+// 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 PerformanceFish.Prepatching;
+
+namespace PerformanceFish;
+
+public class ContentFinderCaching : ClassWithFishPrepatches
+{
+	public class Get_Patch : FishPrepatch
+	{
+		public override string? Description { get; }
+			= "Caches texture lookups on the ContentFinder. This has a relatively large performance impact when used "
+			+ "with mods like humanoid alien races";
+
+		public override MethodBase TargetMethodBase { get; } = methodof(ContentFinder<Texture2D>.Get);
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static bool Prefix<T>(string itemPath, bool reportFailure, ref T? __result, out bool __state)
+		{
+			ref var cache = ref Cache.ByReference<string, CacheValue<T>>.GetOrAddReference(itemPath);
+			
+			if (!cache.Cached)
+				return __state = true;
+			
+			__result = cache.Value;
+			
+			return __state = reportFailure && __result is null;
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static void Postfix<T>(string itemPath, T? __result, bool __state)
+		{
+			if (!__state)
+				return;
+			
+			UpdateCache(itemPath, __result);
+		}
+
+		[MethodImpl(MethodImplOptions.NoInlining)]
+		private static void UpdateCache<T>(string itemPath, T? __result)
+		{
+			ref var cache = ref Cache.ByReference<string, CacheValue<T>>.GetExistingReference(itemPath);
+
+			cache.Cached = true;
+			cache.Value = __result;
+		}
+	}
+
+	public record struct CacheValue<T>(bool Cached, T? Value);
+}