title: Download the image by url , or convert it with base64
body: <p>My app receive a jsonArray that contain names of categories and their images urls. which is the best to do:</p>
  
  <ol>
  <li>send the url of the images and after that download them.</li>
  <li>or instead of sending the url I will send the images converted with base64.
  actually I know that base64 is more larger, but I just want to do a trade off between the size and the number of the requests, I mean which is better: to get one large request, or get a lot of small request ?</li>
  </ol>
  
  <p>I have about 20 categories and the image is just 20-30 Kb.</p>