From 5f6808db9a30928b8f1fdb145208d591ab6c7121 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Sun, 5 Jul 2020 22:38:18 -0400
Subject: [PATCH] Optimize NetworkManager Exception Handling

---
 .../network/Varint21FrameDecoder.java.patch       | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 paper-server/patches/sources/net/minecraft/network/Varint21FrameDecoder.java.patch

diff --git a/paper-server/patches/sources/net/minecraft/network/Varint21FrameDecoder.java.patch b/paper-server/patches/sources/net/minecraft/network/Varint21FrameDecoder.java.patch
new file mode 100644
index 0000000000..e9aad632b1
--- /dev/null
+++ b/paper-server/patches/sources/net/minecraft/network/Varint21FrameDecoder.java.patch
@@ -0,0 +1,15 @@
+--- a/net/minecraft/network/Varint21FrameDecoder.java
++++ b/net/minecraft/network/Varint21FrameDecoder.java
+@@ -39,6 +39,12 @@
+     }
+ 
+     protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf, List<Object> list) {
++        // Paper start - Perf: Optimize exception handling; if channel is not active just discard the packet
++        if (!channelHandlerContext.channel().isActive()) {
++            byteBuf.skipBytes(byteBuf.readableBytes());
++            return;
++        }
++        // Paper end - Perf: Optimize exception handling
+         byteBuf.markReaderIndex();
+         this.helperBuf.clear();
+         if (!copyVarint(byteBuf, this.helperBuf)) {