Paper/patches/server-remapped/0142-Make-targetSize-more-aggressive-in-the-chunk-unload-.patch

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 175bf535066afc42de8a3f0d11c46af66f3e3e52..3b6f35b695117bd2b0c71b994efc55fa1084eddc 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -119,7 +119,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
     private final PlayerMap playerMap;
     public final Int2ObjectMap<ChunkMap.TrackedEntity> entityMap;
     private final Long2ByteMap chunkTypeCache;
-    private final Queue<Runnable> unloadQueue;
+    private final Queue<Runnable> unloadQueue; private final Queue<Runnable> getUnloadQueueTasks() { return this.unloadQueue; } // Paper - OBFHELPER
     private int viewDistance;
 
     // CraftBukkit start - recursion-safe executor for Chunk loadCallback() and unloadCallback()
@@ -177,7 +177,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
         this.playerMap = new PlayerMap();
         this.entityMap = new Int2ObjectOpenHashMap();
         this.chunkTypeCache = new Long2ByteOpenHashMap();
-        this.unloadQueue = Queues.newConcurrentLinkedQueue();
+        this.unloadQueue = new com.destroystokyo.paper.utils.CachedSizeConcurrentLinkedQueue<>(); // Paper - need constant-time size()
         this.structureManager = definedstructuremanager;
         this.storageFolder = convertable_conversionsession.getDimensionPath(worldserver.dimension());
         this.level = worldserver;
@@ -435,7 +435,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
         // Spigot start
         org.spigotmc.SlackActivityAccountant activityAccountant = this.level.getServer().slackActivityAccountant;
         activityAccountant.startActivity(0.5);
-        int targetSize = (int) (this.toDrop.size() * UNLOAD_QUEUE_RESIZE_FACTOR);
+        int targetSize = Math.min(this.toDrop.size() - 100,  (int) (this.toDrop.size() * UNLOAD_QUEUE_RESIZE_FACTOR)); // Paper - Make more aggressive
         // Spigot end
         while (longiterator.hasNext()) { // Spigot
             long j = longiterator.nextLong();
@@ -457,7 +457,8 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
 
         Runnable runnable;
 
-        while ((shouldKeepTicking.getAsBoolean() || this.unloadQueue.size() > 2000) && (runnable = (Runnable) this.unloadQueue.poll()) != null) {
+        int queueTarget = Math.min(this.getUnloadQueueTasks().size() - 100, (int) (this.getUnloadQueueTasks().size() * UNLOAD_QUEUE_RESIZE_FACTOR)); // Paper - Target this queue as well
+        while ((shouldKeepTicking.getAsBoolean() || this.getUnloadQueueTasks().size() > queueTarget) && (runnable = (Runnable)this.getUnloadQueueTasks().poll()) != null) { // Paper - Target this queue as well
             runnable.run();
         }