Mainly more hauling optimizations, utilizing linked storage groups

This also adds an experimental, usually slower, threaded gas grid mode and implements a workaround for the whole mod and game failing to start when opening prepatcher's mod manager with unfortunate timing

Source/PerformanceFish/Utility/Is.cs

@@ -0,0 +1,20 @@
+// https://stackoverflow.com/a/18363848
+
+using System.Diagnostics.CodeAnalysis;
+
+namespace PerformanceFish.Utility;
+
+public static class Is
+{
+	public static bool Null<T>(T? value) where T : class => value == null;
+
+	public static bool NotNull<T>([NotNullWhen(true)] T? value) where T : class => value != null;
+
+	public static bool Null<T>(T? nullableValue) where T : struct => !nullableValue.HasValue;
+
+	public static bool NotNull<T>([NotNullWhen(true)] T? nullableValue) where T : struct => nullableValue.HasValue;
+
+	public static bool HasValue<T>([NotNullWhen(true)] T? nullableValue) where T : struct => nullableValue.HasValue;
+
+	public static bool HasNoValue<T>(T? nullableValue) where T : struct => !nullableValue.HasValue;
+}

Source/PerformanceFish/Utility/MiscExtensions.cs

@@ -29,9 +29,29 @@ public static class MiscExtensions
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static bool IsItem(this Thing thing) => thing.def.category == ThingCategory.Item;
 
+	public static StorageSettings? TryGetGroupStoreSettings(this ISlotGroupParent slotGroupParent)
+		=> slotGroupParent.TryGetStorageGroup()?.GetStoreSettings();
+
+	public static StorageGroup? TryGetStorageGroup(this SlotGroup slotGroup) => slotGroup.parent.TryGetStorageGroup();
+
+	public static StorageGroup? TryGetStorageGroup(this ISlotGroupParent slotGroupParent)
+		=> slotGroupParent is IStorageGroupMember groupMember ? groupMember.Group : null;
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static bool Accepts(this StorageGroup storageGroup, Thing t)
+		=> storageGroup.GetStoreSettings().AllowedToAccept(t);
+
 	public static ISlotGroupParent? GetSlotGroupParent(this in IntVec3 position, Map map)
 		=> map.haulDestinationManager.SlotGroupAt(position)?.parent;
 
+	public static StorageSettings? GetThingStoreSettings(this SlotGroup slotGroup)
+		=> slotGroup.parent.GetThingStoreSettings();
+
+	public static StorageSettings? GetThingStoreSettings(this ISlotGroupParent slotGroupParent)
+		=> slotGroupParent is IStorageGroupMember groupMember
+			? groupMember.ThingStoreSettings
+			: slotGroupParent.GetStoreSettings();
+
 	public static ISlotGroupParent? StoringSlotGroupParent(this Thing thing)
 		=> thing.Position.GetSlotGroupParent(thing.GetMap());
 

Source/PerformanceFish/Utility/ThingPositionComparer.cs

@@ -0,0 +1,16 @@
+// 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.Utility;
+
+public sealed class ThingPositionComparer : IComparer<Thing>
+{
+	public IntVec3 rootCell;
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public int Compare(Thing x, Thing y)
+		=> (x.Position - rootCell).LengthHorizontalSquared.CompareTo(
+			(y.Position - rootCell).LengthHorizontalSquared);
+}