http.go
func (resp *Response) WriteDeflate(w *bufio.Writer) error {
	return resp.WriteDeflateLevel(w, CompressDefaultCompression)
}
func (resp *Response) WriteDeflate(w *bufio.Writer) error {
	return resp.WriteDeflateLevel(w, CompressDefaultCompression)
}
// WriteDeflate writes response with deflated body to w.
//
// The method deflates response body and sets 'Content-Encoding: deflate'
// header before writing response to w.
//
// WriteDeflate doesn't flush response to w for performance reasons.