From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Wed, 30 Nov 2022 15:51:59 +0100
Subject: [PATCH] Cache BlockStatePairKey hash

License: LGPL-3.0 (https://www.gnu.org/licenses/lgpl-3.0.html)
Gale - https://galemc.org

This patch is based on the following mixin:
"me/jellysquid/mods/lithium/mixin/cached_hashcode/BlockNeighborGroupMixin.java"
By: Angeline <jellysquid3@users.noreply.github.com>
As part of: Lithium (https://github.com/CaffeineMC/lithium-fabric)
Licensed under: LGPL-3.0 (https://www.gnu.org/licenses/lgpl-3.0.html)

diff --git a/src/main/java/net/minecraft/world/level/block/Block.java b/src/main/java/net/minecraft/world/level/block/Block.java
index 29947de9eb6887f2e61516523ff08d8b581b0f53..b807f4a5239f32e6b6080a58e055357b7341cf00 100644
--- a/src/main/java/net/minecraft/world/level/block/Block.java
+++ b/src/main/java/net/minecraft/world/level/block/Block.java
@@ -600,11 +600,18 @@ public class Block extends BlockBehaviour implements ItemLike {
         private final BlockState first;
         private final BlockState second;
         private final Direction direction;
+        private final int hash; // Gale - Lithium - cache BlockStatePairKey hash
 
         public BlockStatePairKey(BlockState self, BlockState other, Direction facing) {
             this.first = self;
             this.second = other;
             this.direction = facing;
+            // Gale start - Lithium - cache BlockStatePairKey hash
+            int hash = this.first.hashCode();
+            hash = 31 * hash + this.second.hashCode();
+            hash = 31 * hash + this.direction.hashCode();
+            this.hash = hash;
+            // Gale end - Lithium - cache BlockStatePairKey hash
         }
 
         public boolean equals(Object object) {
@@ -620,11 +627,7 @@ public class Block extends BlockBehaviour implements ItemLike {
         }
 
         public int hashCode() {
-            int i = this.first.hashCode();
-
-            i = 31 * i + this.second.hashCode();
-            i = 31 * i + this.direction.hashCode();
-            return i;
+            return this.hash; // Gale - Lithium - cache BlockStatePairKey hash
         }
     }
 }