From 809ea02511f0b8027fdf30e49e875df77a6766fb Mon Sep 17 00:00:00 2001
From: Lucas Clemente <lucas@clemente.io>
Date: Wed, 7 Sep 2016 15:20:26 +0200
Subject: [PATCH] use packetPacker.controlFrames as stack, decreasing allocs

---
 packet_packer.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packet_packer.go b/packet_packer.go
index acb8bb08..466dee7a 100644
--- a/packet_packer.go
+++ b/packet_packer.go
@@ -162,14 +162,14 @@ func (p *packetPacker) composeNextPacket(stopWaitingFrame *frames.StopWaitingFra
 	}
 
 	for len(p.controlFrames) > 0 {
-		frame := p.controlFrames[0]
+		frame := p.controlFrames[len(p.controlFrames)-1]
 		minLength, _ := frame.MinLength(p.version) // controlFrames does not contain any StopWaitingFrames. So it will *never* return an error
 		if payloadLength+minLength > maxFrameSize {
 			break
 		}
 		payloadFrames = append(payloadFrames, frame)
 		payloadLength += minLength
-		p.controlFrames = p.controlFrames[1:]
+		p.controlFrames = p.controlFrames[:len(p.controlFrames)-1]
 	}
 
 	if payloadLength > maxFrameSize {