From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: MrHua269 <mrhua269@gmail.com>
Date: Thu, 4 Jun 2026 17:28:24 +0800
Subject: [PATCH] Gale: Cache ShapePairKey hash

License: LGPL-3.0-only (https://www.gnu.org/licenses/lgpl-3.0.html)
Gale - https://github.com/GaleMC/Gale

The JMH benchmark of this patch can be found in SunBox's `RecordHashCode`

diff --git a/net/minecraft/world/level/block/Block.java b/net/minecraft/world/level/block/Block.java
index 423c45d7be8ac0c27fd3caa0aa8f15f25ad4a3a6..1af396a051cc47dccb973ca864cf1ec2e8b756ed 100644
--- a/net/minecraft/world/level/block/Block.java
+++ b/net/minecraft/world/level/block/Block.java
@@ -696,7 +696,20 @@ public class Block extends BlockBehaviour implements ItemLike {
     }
     // CraftBukkit end
 
-    private record ShapePairKey(VoxelShape first, VoxelShape second) {
+    // Gale start - cache ShapePairKey hash
+    static class ShapePairKey {
+
+        private final VoxelShape first;
+        private final VoxelShape second;
+        private final int hash;
+
+        private ShapePairKey(VoxelShape first, VoxelShape second) {
+            this.first = first;
+            this.second = second;
+            this.hash = System.identityHashCode(this.first) * 31 + System.identityHashCode(this.second);
+        }
+    // Gale end - cache ShapePairKey hash
+
         @Override
         public boolean equals(final Object o) {
             return o instanceof Block.ShapePairKey that && this.first == that.first && this.second == that.second;
@@ -704,7 +717,7 @@ public class Block extends BlockBehaviour implements ItemLike {
 
         @Override
         public int hashCode() {
-            return System.identityHashCode(this.first) * 31 + System.identityHashCode(this.second);
+            return this.hash; // Gale - cache ShapePairKey hash
         }
     }