title: optimising multiple asynchronous image downloads in iOS
body: <p>I want to download a lot of pictures from the server. How can I do this as fast as possible? Currently I am using:</p>
  
  <pre><code>UIImage* myImage = [UIImage imageWithData: 
  [NSData dataWithContentsOfURL: 
  [NSURL URLWithString: @"http://example.com/image.jpg"]]];
  </code></pre>
  
  <p>It is painfully slow. Is there any speed increase in downloading multiple images at the same time (asynchronously), and if so how many is too many?</p>