It seems that the compression doesn't take effect

[zhanghaiyang9999]

the function

func (pc *packetCompressor) writePacket(mc *mysqlConn, packet []byte) (int, error) {
if len(packet) == 0 {
return 0, nil
}

var index = 0

for index < len(packet) {
	var err error
	var remain = len(packet) - index
	var bytesWritten int

	**bytesWritten, err = pc.writeToBuffer(packet[index:], mc.compressionSequence, remain < minCompressSize)**
	if err != nil {
		return index, err
	}

Please see the BOLD line

and the function writeToBuffer

func (pc *packetCompressor) writeToBuffer(data []byte, sequence uint8, compress bool) (int, error) {

the 3rd parameter is compress bool, it means always is false.