From 3fd7a8e63220cb6fe7d57df374d54cfc327b4354 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 e7ae4c706..51e05f414 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) {
-- 
2.11.0