papermc/patches/server/0129-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 a10848e6899853f447f101675e3a6aba9d3d43f3..50b2dc91f4926ebc4511e44e3aa3062eadc40ea0 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -226,8 +226,8 @@ 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.structureManager = structureManager;
+        this.unloadQueue = new com.destroystokyo.paper.utils.CachedSizeConcurrentLinkedQueue<>(); // Paper - need constant-time size()
         Path path = session.getDimensionPath(world.dimension());
 
         this.storageName = path.getFileName().toString();
@@ -569,7 +569,7 @@ 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();
@@ -589,7 +589,7 @@ 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;