From 2e8dd217d3839574879f4db1f0a79e321aec23a9 Mon Sep 17 00:00:00 2001
From: vemacs <d@nkmem.es>
Date: Wed, 23 Nov 2016 08:31:45 -0500
Subject: [PATCH] Cache user authenticator threads


diff --git a/src/main/java/net/minecraft/server/LoginListener.java b/src/main/java/net/minecraft/server/LoginListener.java
index fe390fe..f4735a8 100644
--- a/src/main/java/net/minecraft/server/LoginListener.java
+++ b/src/main/java/net/minecraft/server/LoginListener.java
@@ -15,6 +15,9 @@ import java.security.PrivateKey;
 import java.util.Arrays;
 import java.util.Random;
 import java.util.UUID;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.atomic.AtomicInteger;
 import javax.annotation.Nullable;
 import javax.crypto.SecretKey;
@@ -43,6 +46,14 @@ public class LoginListener implements PacketLoginInListener, ITickable {
     private SecretKey loginKey;
     private EntityPlayer l;
     public String hostname = ""; // CraftBukkit - add field
+    private static final ExecutorService authenticatorPool = Executors.newCachedThreadPool(
+            new ThreadFactory() {
+                @Override
+                public Thread newThread(Runnable r) {
+                    return new Thread(r, "User Authenticator #" + LoginListener.b.incrementAndGet());
+                }
+            }
+    ); // Paper - Cache authenticator threads
 
     public LoginListener(MinecraftServer minecraftserver, NetworkManager networkmanager) {
         this.g = LoginListener.EnumProtocolState.HELLO;
@@ -166,8 +177,8 @@ public class LoginListener implements PacketLoginInListener, ITickable {
             this.networkManager.sendPacket(new PacketLoginOutEncryptionBegin("", this.server.O().getPublic(), this.e));
         } else {
             // Spigot start
-            new Thread("User Authenticator #" + LoginListener.b.incrementAndGet()) {
-
+            // Paper start - Cache authenticator threads
+            authenticatorPool.execute(new Runnable() {
                 @Override
                 public void run() {
                     try {
@@ -179,7 +190,8 @@ public class LoginListener implements PacketLoginInListener, ITickable {
                         server.server.getLogger().log(java.util.logging.Level.WARNING, "Exception verifying " + i.getName(), ex);
                     }
                 }
-            }.start();
+            });
+            // Paper end
             // Spigot end
         }
 
@@ -195,7 +207,8 @@ public class LoginListener implements PacketLoginInListener, ITickable {
             this.loginKey = packetlogininencryptionbegin.a(privatekey);
             this.g = LoginListener.EnumProtocolState.AUTHENTICATING;
             this.networkManager.a(this.loginKey);
-            (new Thread("User Authenticator #" + LoginListener.b.incrementAndGet()) {
+            // Paper start - Cache authenticator threads
+            authenticatorPool.execute(new Runnable() {
                 public void run() {
                     GameProfile gameprofile = LoginListener.this.i;
 
@@ -242,7 +255,8 @@ public class LoginListener implements PacketLoginInListener, ITickable {
 
                     return LoginListener.this.server.ac() && socketaddress instanceof InetSocketAddress ? ((InetSocketAddress) socketaddress).getAddress() : null;
                 }
-            }).start();
+            });
+            // Paper end
         }
     }
 
-- 
2.8.3.windows.1