testserver/patches/server/0320-improve-CraftWorld-isChunkLoaded.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Tue, 21 May 2019 02:34:04 +0100
Subject: [PATCH] improve CraftWorld#isChunkLoaded

getChunkAt will request the chunk using vanillas chunk loading system,
which while we're not going to load the chunk, does involve the server
waiting for the execution queue to get to our request; We can just query
the chunk status and get a response now, vs having to wait

diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 7540be1005db97a20d44d55c0e59547113d6ad80..c7e919516254eabd21dc460be4569c44d1fe1176 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -288,13 +288,13 @@ public class CraftWorld extends CraftRegionAccessor implements World {
 
     @Override
     public boolean isChunkLoaded(int x, int z) {
-        return this.world.getChunkSource().isChunkLoaded(x, z);
+        return this.world.getChunkSource().getChunkAtIfLoadedImmediately(x, z) != null; // Paper
     }
 
     @Override
     public boolean isChunkGenerated(int x, int z) {
         try {
-            return this.isChunkLoaded(x, z) || this.world.getChunkSource().chunkMap.read(new ChunkPos(x, z)) != null;
+            return this.world.getChunkSource().getChunkAtIfCachedImmediately(x, z) != null || this.world.getChunkSource().chunkMap.read(new ChunkPos(x, z)) != null; // Paper (TODO check if the first part can be removed)
         } catch (IOException ex) {
             throw new RuntimeException(ex);
         }