Paper/patches/server/0133-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 13038723347cdbada65611d9de542d35d94084a0..e954365c9fe7a5f442c4ab31ab8c8db9684409e8 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -221,7 +221,7 @@ 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 = structureManager;
         Path path = session.getDimensionPath(world.dimension());
 
@@ -567,7 +567,7 @@ 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() * ChunkMap.UNLOAD_QUEUE_RESIZE_FACTOR);
+        int targetSize = Math.min(this.toDrop.size() - 100,  (int) (this.toDrop.size() * ChunkMap.UNLOAD_QUEUE_RESIZE_FACTOR)); // Paper - Make more aggressive
         // Spigot end
         while (longiterator.hasNext()) { // Spigot
             long j = longiterator.nextLong();
@@ -587,7 +587,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
         }
         activityAccountant.endActivity(); // Spigot
 
-        int k = Math.max(0, this.unloadQueue.size() - 2000);
+        int k = Math.max(0, Math.min(100, this.unloadQueue.size() - (int) (this.unloadQueue.size() * UNLOAD_QUEUE_RESIZE_FACTOR))); // Paper - Target this queue as well
 
         Runnable runnable;