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Paper/Spigot-Server-Patches/0080-Optimize-Chunk-Access.patch

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From 196ffe1d3f60888cdd167fab8e5e514254f2eb55 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 27 Aug 2015 01:15:02 -0400
Subject: [PATCH] Optimize Chunk Access
getting a loaded chunk is one of the most hottest pieces of code in the game.
getChunkAt is called for the same chunk multiple times in a row, often from getType();
Optimize this look up by using a Last Access cache.
diff --git a/src/main/java/net/minecraft/server/ChunkMap.java b/src/main/java/net/minecraft/server/ChunkMap.java
index 0c2386f5e..5757aa80f 100644
--- a/src/main/java/net/minecraft/server/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/ChunkMap.java
@@ -106,8 +106,22 @@ public class ChunkMap extends Long2ObjectOpenHashMap<Chunk> {
}
}
+ // Paper start
+ if (lastChunkByPos != null && i == lastChunkByPos.chunkKey) {
+ lastChunkByPos = null;
+ }
return chunk;
}
+ private Chunk lastChunkByPos = null; // Paper
+
+ @Override
+ public Chunk get(long l) {
+ if (lastChunkByPos != null && l == lastChunkByPos.chunkKey) {
+ return lastChunkByPos;
+ }
+ return super.get(l);
+ }
+ // Paper end
public Chunk a(Object object) {
return this.a(((Long) object).longValue());
--
2.18.0