Paper/Spigot-Server-Patches/0171-Optimise-NetworkManager.patch

From 863b08010dbfe4e4046e553ced31acb9c2d2fde1 Mon Sep 17 00:00:00 2001
From: Alfie Cleveland <alfeh@me.com>
Date: Fri, 25 Nov 2016 20:35:05 +0000
Subject: [PATCH] Optimise NetworkManager


diff --git a/src/main/java/net/minecraft/server/NetworkManager.java b/src/main/java/net/minecraft/server/NetworkManager.java
index 184ef32a8..be14c0b25 100644
--- a/src/main/java/net/minecraft/server/NetworkManager.java
+++ b/src/main/java/net/minecraft/server/NetworkManager.java
@@ -62,8 +62,8 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
         }
     };
     private final EnumProtocolDirection h;
-    private final Queue<NetworkManager.QueuedPacket> i = Queues.newConcurrentLinkedQueue();
-    private final ReentrantReadWriteLock j = new ReentrantReadWriteLock();
+    // private final Queue<NetworkManager.QueuedPacket> i = Queues.newConcurrentLinkedQueue(); // Paper
+    // private final ReentrantReadWriteLock j = new ReentrantReadWriteLock(); // Paper
     public Channel channel;
     // Spigot Start // PAIL
     public SocketAddress l;
@@ -141,32 +141,36 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
         if (this.isConnected()) {
             this.m();
             this.a(packet, (GenericFutureListener[]) null);
-        } else {
-            this.j.writeLock().lock();
-
-            try {
-                this.i.add(new NetworkManager.QueuedPacket(packet, (GenericFutureListener[]) null));
-            } finally {
-                this.j.writeLock().unlock();
-            }
         }
-
+        // Paper start - Remove but force a conflict
+//        else {
+//            this.j.writeLock().lock();
+//
+//            try {
+//                this.i.add(new NetworkManager.QueuedPacket(packet, (GenericFutureListener[]) null));
+//            } finally {
+//                this.j.writeLock().unlock();
+//            }
+//        }
+        // Paper end
     }
 
     public void sendPacket(Packet<?> packet, GenericFutureListener<? extends Future<? super Void>> genericfuturelistener, GenericFutureListener<? extends Future<? super Void>>... agenericfuturelistener) {
         if (this.isConnected()) {
             this.m();
             this.a(packet, (GenericFutureListener[]) ArrayUtils.add(agenericfuturelistener, 0, genericfuturelistener));
-        } else {
-            this.j.writeLock().lock();
-
-            try {
-                this.i.add(new NetworkManager.QueuedPacket(packet, (GenericFutureListener[]) ArrayUtils.add(agenericfuturelistener, 0, genericfuturelistener)));
-            } finally {
-                this.j.writeLock().unlock();
-            }
         }
-
+        // Paper start - Remove but force a conflict
+//        else {
+//            this.j.writeLock().lock();
+//
+//            try {
+//                this.i.add(new NetworkManager.QueuedPacket(packet, (GenericFutureListener[]) ArrayUtils.add(agenericfuturelistener, 0, genericfuturelistener)));
+//            } finally {
+//                this.j.writeLock().unlock();
+//            }
+//        }
+        // Paper end
     }
 
     private void a(final Packet<?> packet, @Nullable final GenericFutureListener<? extends Future<? super Void>>[] agenericfuturelistener) {
@@ -211,20 +215,22 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
     }
 
     private void m() {
-        if (this.channel != null && this.channel.isOpen()) {
-            this.j.readLock().lock();
-
-            try {
-                while (!this.i.isEmpty()) {
-                    NetworkManager.QueuedPacket networkmanager_queuedpacket = (NetworkManager.QueuedPacket) this.i.poll();
-
-                    this.a(networkmanager_queuedpacket.a, networkmanager_queuedpacket.b);
-                }
-            } finally {
-                this.j.readLock().unlock();
-            }
-
-        }
+        // Paper start - Remove but force a conflict
+//        if (this.channel != null && this.channel.isOpen()) {
+//            this.j.readLock().lock();
+//
+//            try {
+//                while (!this.i.isEmpty()) {
+//                    NetworkManager.QueuedPacket networkmanager_queuedpacket = (NetworkManager.QueuedPacket) this.i.poll();
+//
+//                    this.a(networkmanager_queuedpacket.a, networkmanager_queuedpacket.b);
+//                }
+//            } finally {
+//                this.j.readLock().unlock();
+//            }
+//
+//        }
+        // Paper end
     }
 
     public void a() {
@@ -317,7 +323,7 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
                 } else if (this.i() != null) {
                     this.i().a(new ChatComponentText("Disconnected"));
                 }
-                this.i.clear(); // Free up packet queue.
+                 // this.i.clear(); // Free up packet queue. // Paper - remove unneeded packet queue
             }
 
         }
-- 
2.12.2.windows.2