java - transfer of image between the server(nodejs) and the android device is too slow -

i trying send image between 2 device socketio.i can send pictures, takes long.i use byte array image transfer.

 public static byte[] getbytes(bitmap bitmap) {     bytearrayoutputstream stream = new bytearrayoutputstream();     bitmap.compress(compressformat.png, 0, stream);     return stream.tobytearray(); }  // convert byte array bitmap public static bitmap getimage(byte[] image) {     return bitmapfactory.decodebytearray(image, 0, image.length); } 

i use getimage(return bitmap) showing.and use getbytes(from bitmap) image transfer.
server log (image byte array) stream of byte array takes long

transfer process takes long.is there faster solution know? use gottox-client on android socketio.thanks in advance..
update
in android:

            message msg = new message();             msg.settype("image");             msg.setimage(dbbitmaputility.getbytes(bmp));             msg.setsender(username);             msg.setto(toname);             gson gson = new gson();             string json = gson.tojson(msg);              socket.emit("message", json); 

in nodejs server:

                socket.on('message', function(message) {                    users[obj.to].emit('event', message);                    //save mongodb on nodejs                } 

on receive in android:

            if (event.tostring().equals("event")) {              type listtype = new typetoken<message>() {             }.gettype();              gson gson = new gson();             message message = gson.fromjson(args[0].tostring(), listtype);             //conditions             mmessages.add(message);             scrollmylistviewtobottom();//notifydatasetchanged         }