Gzip make a light JSON

You could save up to ten times in terms of loading & size when you compress a JSON struct.

func JsonGetHandler(w http.ResponseWriter, r *http.Request) {
    // create header
    w.Header().Add("Accept-Charset", "utf-8")
    w.Header().Add("Content-Type", "application/json")
    w.Header().Set("Content-Encoding", "gzip")
    // Gzip data
    gz := gzip.NewWriter(w)
    json.NewEncoder(gz).Encode(data)
    gz.Close()
}

(In this last exemple you replace data to your struct).