From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Brokkonaut <hannos17@gmx.de>
Date: Tue, 7 Feb 2017 16:55:35 -0600
Subject: [PATCH] Make targetSize more aggressive in the chunk unload queue


diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index e1200e903e39c3e5cb023e1bd4fe104907c0c6eb..702d885b6a5caf8cabc40934893a081b01906781 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -232,7 +232,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
         this.entityMap = new Int2ObjectOpenHashMap();
         this.chunkTypeCache = new Long2ByteOpenHashMap();
         this.chunkSaveCooldowns = new Long2LongOpenHashMap();
-        this.unloadQueue = Queues.newConcurrentLinkedQueue();
+        this.unloadQueue = new com.destroystokyo.paper.utils.CachedSizeConcurrentLinkedQueue<>(); // Paper - need constant-time size()
         this.structureTemplateManager = structureTemplateManager;
         Path path = session.getDimensionPath(world.dimension());
 
@@ -587,7 +587,6 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
 
     private void processUnloads(BooleanSupplier shouldKeepTicking) {
         LongIterator longiterator = this.toDrop.iterator();
-
         for (int i = 0; longiterator.hasNext() && (shouldKeepTicking.getAsBoolean() || i < 200 || this.toDrop.size() > 2000); longiterator.remove()) {
             long j = longiterator.nextLong();
             ChunkHolder playerchunk = (ChunkHolder) this.updatingChunkMap.remove(j);
@@ -600,7 +599,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
             }
         }
 
-        int k = Math.max(0, this.unloadQueue.size() - 2000);
+        int k = Math.max(100, this.unloadQueue.size() - 2000); // Paper - Unload more than just up to queue size 2000
 
         Runnable runnable;