PaperSpigot-Parent/CraftBukkit-Patches/0041-Optimized-version-of-LocaleLanguage.patch

From 7fc33371f89d29558ce22c66fcec47e6b1b13038 Mon Sep 17 00:00:00 2001
From: snowleo <schneeleo@gmail.com>
Date: Wed, 8 May 2013 12:09:45 +1000
Subject: [PATCH] Optimized version of LocaleLanguage

This patch reduces the memory footprint of each EntityPlayer by about 300 KB. The original class looks very unfinished and future versions might use the commented code.

diff --git a/src/main/java/net/minecraft/server/LocaleLanguage.java b/src/main/java/net/minecraft/server/LocaleLanguage.java
index d88f864..2a52fe3 100644
--- a/src/main/java/net/minecraft/server/LocaleLanguage.java
+++ b/src/main/java/net/minecraft/server/LocaleLanguage.java
@@ -1,5 +1,10 @@
 package net.minecraft.server;
 
+// Spigot start
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+// Spigot end
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileReader;
@@ -12,15 +17,23 @@ import java.util.TreeMap;
 
 public class LocaleLanguage {
 
+    // Spigot - cache languages to prevent reloading on each player creation
+    private static Cache<String,Properties> languages = CacheBuilder.newBuilder().weakValues().build(
+        new CacheLoader<String, Properties>() {
+            public Properties load(String key) {
+                return loadLanguage(key);
+            }
+        });
     private static LocaleLanguage a = new LocaleLanguage("en_US");
-    private Properties b = new Properties();
-    private TreeMap c;
-    private TreeMap d = new TreeMap();
+    private volatile Properties b = new Properties(); // Spigot - volatile
+    private static TreeMap c; // Spigot - static
+    // private TreeMap d = new TreeMap(); // Spigot - Unused map
     private String e;
-    private boolean f;
+    // private boolean f; // Spigot - removed
+    static { e(); } // Spigot - initializer
 
     public LocaleLanguage(String s) {
-        this.e();
+        // this.e(); // Spigot: moved up
         this.a(s, false);
     }
 
@@ -28,7 +41,7 @@ public class LocaleLanguage {
         return a;
     }
 
-    private void e() {
+    private static void e() { // Spigot - static
         TreeMap treemap = new TreeMap();
 
         try {
@@ -46,23 +59,25 @@ public class LocaleLanguage {
             return;
         }
 
-        this.c = treemap;
-        this.c.put("en_US", "English (US)");
+        c = treemap; // Spigot - this => static
+        c.put("en_US", "English (US)"); // Spigot - this => static
     }
 
     public TreeMap b() {
         return this.c;
     }
 
-    private void a(Properties properties, String s) throws IOException {
+    private static void a(Properties properties, String s) throws IOException { // Spigot - static
         BufferedReader bufferedreader = null;
 
+        /* Spigot - unused map
         if (this.d.containsKey(s)) {
             bufferedreader = new BufferedReader(new FileReader((File) this.d.get(s)));
         } else {
+        */
             bufferedreader = new BufferedReader(new InputStreamReader(LocaleLanguage.class.getResourceAsStream("/lang/" + s + ".lang"), "UTF-8"));
-        }
-
+        //} // Spigot: unused map
+        try { // Spigot: close reader
         for (String s1 = bufferedreader.readLine(); s1 != null; s1 = bufferedreader.readLine()) {
             s1 = s1.trim();
             if (!s1.startsWith("#")) {
@@ -73,22 +88,32 @@ public class LocaleLanguage {
                 }
             }
         }
+        } finally { bufferedreader.close(); } // Spigot - close reader
     }
 
     public synchronized void a(String s, boolean flag) {
         if (flag || !s.equals(this.e)) {
+            // Spigot start - Move loading code to new static method
+            this.e = s;
+            this.b = languages.getUnchecked(s);
+        }
+    }
+    
+    private static Properties loadLanguage(String s) {
+            // Spigot end
             Properties properties = new Properties();
 
             try {
-                this.a(properties, "en_US");
+                a(properties, "en_US"); // Spigot - this => static
             } catch (IOException ioexception) {
                 ;
             }
 
-            this.f = false;
+            // this.f = false; // Spigot - removed variable
             if (!"en_US".equals(s)) {
                 try {
-                    this.a(properties, s);
+                    a(properties, s); // Spigot - this => static
+                    /* Spigot - f is unused, so unneeded code
                     Enumeration enumeration = properties.propertyNames();
 
                     while (enumeration.hasMoreElements() && !this.f) {
@@ -106,22 +131,25 @@ public class LocaleLanguage {
                             }
                         }
                     }
+                    */
                 } catch (IOException ioexception1) {
                     ioexception1.printStackTrace();
-                    return;
+                    //return; // Spigot - moved down
                 }
             }
-
+            return properties; // Spigot - return properties
+            /* Spigot - moved up
             this.e = s;
             this.b = properties;
         }
+        */
     }
 
-    public synchronized String a(String s) {
+    public String a(String s) { // Spigot - removed synchronized, b is volatile
         return this.b.getProperty(s, s);
     }
 
-    public synchronized String a(String s, Object... aobject) {
+    public String a(String s, Object... aobject) { // Spigot - removed synchronized, b is volatile
         String s1 = this.b.getProperty(s, s);
 
         try {
@@ -131,11 +159,11 @@ public class LocaleLanguage {
         }
     }
 
-    public synchronized boolean b(String s) {
+    public boolean b(String s) { // Spigot - removed synchronized, b is volatile
         return this.b.containsKey(s);
     }
 
-    public synchronized String c(String s) {
+    public String c(String s) { // Spigot - removed synchronized, b is volatile
         return this.b.getProperty(s + ".name", "");
     }
 }
-- 
1.8.2.1