From daecf055f5627775e56ffd825791463caba20229 Mon Sep 17 00:00:00 2001
From: Nassim Jahnke <nassim@njahnke.dev>
Date: Fri, 6 Sep 2024 21:03:17 +0200
Subject: [PATCH] Use reference hash set in reference Holder (#11363)

---
 ...-keys-and-optimize-reference-Holder-ta.patch} | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)
 rename patches/server/{cache-resource-keys.patch => Cache-resource-keys-and-optimize-reference-Holder-ta.patch} (80%)

diff --git a/patches/server/cache-resource-keys.patch b/patches/server/Cache-resource-keys-and-optimize-reference-Holder-ta.patch
similarity index 80%
rename from patches/server/cache-resource-keys.patch
rename to patches/server/Cache-resource-keys-and-optimize-reference-Holder-ta.patch
index 52efd99091..a547802912 100644
--- a/patches/server/cache-resource-keys.patch
+++ b/patches/server/Cache-resource-keys-and-optimize-reference-Holder-ta.patch
@@ -1,9 +1,23 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: Jake Potrebic <jake.m.potrebic@gmail.com>
 Date: Sun, 20 Mar 2022 22:06:47 -0700
-Subject: [PATCH] cache resource keys
+Subject: [PATCH] Cache resource keys and optimize reference Holder tags set
 
+TagKeys are always interned, so we can use a reference hash set for them
 
+diff --git a/src/main/java/net/minecraft/core/Holder.java b/src/main/java/net/minecraft/core/Holder.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/core/Holder.java
++++ b/src/main/java/net/minecraft/core/Holder.java
+@@ -0,0 +0,0 @@ public interface Holder<T> {
+         }
+ 
+         void bindTags(Collection<TagKey<T>> tags) {
+-            this.tags = Set.copyOf(tags);
++            this.tags = java.util.Collections.unmodifiableSet(new it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet<>(tags)); // Paper
+         }
+ 
+         @Override
 diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBiome.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBiome.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/org/bukkit/craftbukkit/block/CraftBiome.java