title: What is the difference between NSURLRequest and URLRequest in Swift?
body: <p>I'm looking through some swift documents and I see that NSURLRequest and URLRequest are practically the same, with the added tidbit that NSURLRequest is used:</p>
  
  <blockquote>
    <p>when you need reference semantics or other Foundation-specific behavior.</p>
  </blockquote>
  
  <p>Is one faster than the other and in what situations should one be used over the other?</p>