papermc/Spigot-Server-Patches/0041-Improve-Network-Manager-packet-handling.patch

From 76e7fcd0a61b789ca55fb33bb95be63375ed7f23 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 19 Oct 2014 16:01:51 -0500
Subject: [PATCH] Improve Network Manager packet handling

Removes an unnecessary "peek at head of queue", and also makes the number of packets
processed per player per tick configurable, so larger servers can slow down incoming processing.

diff --git a/src/main/java/net/minecraft/server/NetworkManager.java b/src/main/java/net/minecraft/server/NetworkManager.java
index 76a5403..5a5604c 100644
--- a/src/main/java/net/minecraft/server/NetworkManager.java
+++ b/src/main/java/net/minecraft/server/NetworkManager.java
@@ -154,11 +154,12 @@ public class NetworkManager extends SimpleChannelInboundHandler {
 
     private void i() {
         if (this.m != null && this.m.isOpen()) {
-            while (!this.l.isEmpty()) {
-                QueuedPacket queuedpacket = (QueuedPacket) this.l.poll();
-
+            // PaperSpigot  start - Improve Network Manager packet handling
+            QueuedPacket queuedpacket;
+            while ((queuedpacket = (QueuedPacket) this.l.poll()) != null) {
                 this.b(QueuedPacket.a(queuedpacket), QueuedPacket.b(queuedpacket));
             }
+            // PaperSpigot end
         }
     }
 
@@ -175,8 +176,10 @@ public class NetworkManager extends SimpleChannelInboundHandler {
         }
 
         if (this.o != null) {
-            for (int i = 1000; !this.k.isEmpty() && i >= 0; --i) {
-                Packet packet = (Packet) this.k.poll();
+            // PaperSpigot start - Improve Network Manager packet handling - Configurable packets per player per tick processing
+            Packet packet;
+            for (int i = org.github.paperspigot.PaperSpigotConfig.maxPacketsPerPlayer; (packet = (Packet) this.k.poll()) != null && i >= 0; --i) {
+                // PaperSpigot end
 
                 // CraftBukkit start
                 if (!this.isConnected() || !this.m.config().isAutoRead()) {
diff --git a/src/main/java/org/github/paperspigot/PaperSpigotConfig.java b/src/main/java/org/github/paperspigot/PaperSpigotConfig.java
index a7b18e4..df42019 100644
--- a/src/main/java/org/github/paperspigot/PaperSpigotConfig.java
+++ b/src/main/java/org/github/paperspigot/PaperSpigotConfig.java
@@ -169,4 +169,10 @@ public class PaperSpigotConfig
         strengthEffectModifier = getDouble( "effect-modifiers.strength", 1.3D );
         weaknessEffectModifier = getDouble( "effect-modifiers.weakness", -0.5D );
     }
+
+    public static int maxPacketsPerPlayer;
+    private static void maxPacketsPerPlayer()
+    {
+        maxPacketsPerPlayer = getInt( "max-packets-per-player", 1000 );
+    }
 }
-- 
1.9.1