From 18f3fb5196f9f0c8384fcbbfbd86c5b68007cc4f Mon Sep 17 00:00:00 2001
From: Darien Raymond <admin@v2ray.com>
Date: Sun, 29 Jul 2018 10:47:50 +0200
Subject: [PATCH] comment

---
 transport/internet/kcp/connection.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/transport/internet/kcp/connection.go b/transport/internet/kcp/connection.go
index 4cf827362..4b7d92dc2 100644
--- a/transport/internet/kcp/connection.go
+++ b/transport/internet/kcp/connection.go
@@ -343,6 +343,9 @@ func (c *Connection) waitForDataOutput() error {
 
 // Write implements io.Writer.
 func (c *Connection) Write(b []byte) (int, error) {
+	// This involves multiple copies of the buffer. But we don't expect this method to be used often.
+	// Only wrapped connections such as TLS and WebSocket will call into this.
+	// TODO: improve effeciency.
 	var mb buf.MultiBuffer
 	common.Must2(mb.Write(b))
 	if err := c.WriteMultiBuffer(mb); err != nil {