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From 4f91a4c59c79d3e9f13ab9061515227913e5b92b Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 2 Dec 2016 00:11:43 -0500
Subject: [PATCH] Optimize World.isLoaded(BlockPosition)Z

Reduce method invocations for World.isLoaded(BlockPosition)Z

diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index ec0a28cff..2fa63a27f 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -286,7 +286,7 @@ public abstract class World implements IBlockAccess {
     }
 
     public boolean isLoaded(BlockPosition blockposition) {
-        return this.a(blockposition, true);
+        return getChunkIfLoaded(blockposition.getX() >> 4, blockposition.getZ() >> 4) != null; // Paper
     }
 
     public boolean a(BlockPosition blockposition, boolean flag) {
-- 
2.12.2.windows.2