papermc/Spigot-Server-Patches/0341-Optimize-RegistryMaterials.patch

From 4f6f28757c11bdfc4b7f5f127afca881a33d647c Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 26 Aug 2018 20:49:50 -0400
Subject: [PATCH] Optimize RegistryMaterials

Use larger initial sizes to increase bucket capacity on the BiMap

BiMap.get was seen to be using a good bit of CPU time.

diff --git a/src/main/java/net/minecraft/server/RegistryMaterials.java b/src/main/java/net/minecraft/server/RegistryMaterials.java
index 83ce386e0..a47110bba 100644
--- a/src/main/java/net/minecraft/server/RegistryMaterials.java
+++ b/src/main/java/net/minecraft/server/RegistryMaterials.java
@@ -13,8 +13,8 @@ import org.apache.logging.log4j.Logger;
 
 public class RegistryMaterials<V> implements IRegistry<V> {
     protected static final Logger a = LogManager.getLogger();
-    protected final RegistryID<V> b = new RegistryID<V>(256);
-    protected final BiMap<MinecraftKey, V> c = HashBiMap.create();
+    protected final RegistryID<V> b = new RegistryID<V>(2048); // Paper - use bigger expected size to reduce collisions
+    protected final BiMap<MinecraftKey, V> c = HashBiMap.create(2048); // Paper - use bigger expected size to reduce collisions
     protected Object[] d;
     private int x;
 
-- 
2.20.0