From 019850efd673cfb540bad6559c5614d4f666cb73 Mon Sep 17 00:00:00 2001
From: Marten Seemann <martenseemann@gmail.com>
Date: Mon, 14 Dec 2020 11:55:42 +0700
Subject: [PATCH] use a buffer from the pool for composing Retry packets

---
 server.go | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/server.go b/server.go
index 1df61d17..00de7954 100644
--- a/server.go
+++ b/server.go
@@ -565,10 +565,15 @@ func (s *baseServer) sendRetry(remoteAddr net.Addr, hdr *wire.Header) error {
 	replyHdr.SrcConnectionID = srcConnID
 	replyHdr.DestConnectionID = hdr.SrcConnectionID
 	replyHdr.Token = token
-	s.logger.Debugf("Changing connection ID to %s.", srcConnID)
-	s.logger.Debugf("-> Sending Retry")
-	replyHdr.Log(s.logger)
-	buf := &bytes.Buffer{}
+	if s.logger.Debug() {
+		s.logger.Debugf("Changing connection ID to %s.", srcConnID)
+		s.logger.Debugf("-> Sending Retry")
+		replyHdr.Log(s.logger)
+	}
+
+	packetBuffer := getPacketBuffer()
+	defer packetBuffer.Release()
+	buf := bytes.NewBuffer(packetBuffer.Data)
 	if err := replyHdr.Write(buf, hdr.Version); err != nil {
 		return err
 	}