No lookup for worlds, store on object

src/net/minecraft/server/WorldServer.java

@@ -20,7 +20,7 @@ public class WorldServer extends World {
         B = false;
         E = new MCHashTable();
         D = minecraftserver;
-        world = (CraftWorld)D.server.getWorld(this); // CraftBukkit
+        world = new CraftWorld(this); // CraftBukkit
     }
 
     // CraftBukkit start
@@ -37,6 +37,10 @@ public class WorldServer extends World {
         world.updateBlock(i1, j1, k1);
         return result;
     }
+
+    public CraftWorld getWorld() {
+        return world;
+    }
     // CraftBukkit stop
 
     public void f() {

src/org/bukkit/craftbukkit/CraftEntity.java

@@ -20,7 +20,7 @@ public class CraftEntity implements org.bukkit.Entity {
     }
 
     public World getWorld() {
-        return server.getWorld((WorldServer)entity.l);
+        return ((WorldServer)entity.l).getWorld();
     }
 
     public void teleportTo(Location location) {

src/org/bukkit/craftbukkit/CraftServer.java

@@ -19,7 +19,6 @@ public final class CraftServer implements Server {
     private final String serverName = "Craftbukkit";
     private final String serverVersion;
     private final HashMap<String, Player> playerCache = new HashMap<String, Player>();
-    private final HashMap<WorldServer, World> worldCache = new HashMap<WorldServer, World>();
     private final PluginManager pluginManager = new SimplePluginManager(this);
 
     protected final MinecraftServer console;
@@ -87,18 +86,7 @@ public final class CraftServer implements Server {
     }
 
     public World[] getWorlds() {
-        return new World[] { getWorld(console.e) };
-    }
-
-    public World getWorld(WorldServer world) {
-        World result = worldCache.get(world);
-
-        if (result == null) {
-            result = new CraftWorld(world);
-            worldCache.put(world, result);
-        }
-
-        return result;
+        return new World[] { console.e.getWorld() };
     }
 
     public ServerConfigurationManager getHandle() {

src/org/bukkit/craftbukkit/CraftWorld.java

@@ -13,7 +13,7 @@ public class CraftWorld implements World {
     private final Map<BlockCoordinate, Block> blockCache = new HashMap<BlockCoordinate, Block>();
     private final WorldServer world;
 
-    protected CraftWorld(WorldServer world) {
+    public CraftWorld(WorldServer world) {
         this.world = world;
     }