From 1766a8a8d59788875641888455fa5e44b0e1aaf3 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Wed, 29 May 2019 04:01:22 +0100
Subject: [PATCH] ChunkMapDistance CME


diff --git a/src/main/java/net/minecraft/server/ChunkMapDistance.java b/src/main/java/net/minecraft/server/ChunkMapDistance.java
index ed4e8d69ca..a116826490 100644
--- a/src/main/java/net/minecraft/server/ChunkMapDistance.java
+++ b/src/main/java/net/minecraft/server/ChunkMapDistance.java
@@ -36,7 +36,7 @@ public abstract class ChunkMapDistance {
     private final ChunkMapDistance.a e = new ChunkMapDistance.a();
     private final ChunkMapDistance.b f = new ChunkMapDistance.b(8);
     private final ChunkMapDistance.c g = new ChunkMapDistance.c(33);
-    private final Set<PlayerChunk> h = Sets.newHashSet();
+    private final java.util.Queue<PlayerChunk> h = new java.util.LinkedList<>(); // Paper - use a queue
     private final PlayerChunk.c i;
     private final Mailbox<ChunkTaskQueueSorter.a<Runnable>> j;
     private final Mailbox<ChunkTaskQueueSorter.b> k;
@@ -98,11 +98,12 @@ public abstract class ChunkMapDistance {
             ;
         }
 
+        // Paper start
         if (!this.h.isEmpty()) {
-            this.h.forEach((playerchunk) -> {
-                playerchunk.a(playerchunkmap);
-            });
-            this.h.clear();
+            while(!this.h.isEmpty()) {
+                this.h.remove().a(playerchunkmap);
+            }
+            // Paper end
             return true;
         } else {
             if (!this.l.isEmpty()) {
-- 
2.22.0