From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Sat, 24 Dec 2022 13:09:34 +0100
Subject: [PATCH] CraftBukkit UUID to world map

License: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
Gale - https://galemc.org

This patch is based on the following patch:
"Optimize CraftServer.getWorld(UUID)"
By: PureGero <puregero@gmail.com>
As part of: MultiPaper (https://github.com/MultiPaper/MultiPaper)
Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)

diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 889687ee9bcea490e8a7ee29d0a1f81011cd4a34..616eeec8a0d075064727a69a08341d853a3f5482 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -287,6 +287,7 @@ public final class CraftServer implements Server {
     final DedicatedServer console;
     private final DedicatedPlayerList playerList;
     private final Map<String, World> worlds = new LinkedHashMap<>();
+    private final it.unimi.dsi.fastutil.objects.Object2ObjectMap<UUID, World> worldsByUUID = new it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap<>(); // Gale - MultiPaper - CraftBukkit UUID to world map
     private YamlConfiguration configuration;
     private YamlConfiguration commandsConfiguration;
     private final Yaml yaml = new Yaml(new SafeConstructor(new LoaderOptions()));
@@ -1512,6 +1513,7 @@ public final class CraftServer implements Server {
             this.getLogger().log(Level.SEVERE, null, ex);
         }
 
+        this.worldsByUUID.remove(world.getUID()); // Gale - MultiPaper - CraftBukkit UUID to world map
         this.worlds.remove(world.getName().toLowerCase(Locale.ROOT));
         this.console.removeLevel(handle);
         return true;
@@ -1530,12 +1532,7 @@ public final class CraftServer implements Server {
 
     @Override
     public World getWorld(UUID uid) {
-        for (World world : this.worlds.values()) {
-            if (world.getUID().equals(uid)) {
-                return world;
-            }
-        }
-        return null;
+        return this.worldsByUUID.get(uid); // Gale - MultiPaper - CraftBukkit UUID to world map
     }
 
     @Override
@@ -1551,6 +1548,7 @@ public final class CraftServer implements Server {
             System.out.println("World " + world.getName() + " is a duplicate of another world and has been prevented from loading. Please delete the uid.dat file from " + world.getName() + "'s world directory if you want to be able to load the duplicate world.");
             return;
         }
+        this.worldsByUUID.put(world.getUID(), world); // Gale - MultiPaper - CraftBukkit UUID to world map
         this.worlds.put(world.getName().toLowerCase(Locale.ROOT), world);
     }