title: The speed between UI code and UIView
body: <p>There is one project needs to be re-constructed.</p>
  
  <p>Somebody asked me to help do the job.</p>
  
  <p>I noticed 1/3-1/2 of total code are UI code.</p>
  
  <p>My projects are always M-V-C project, UI layer are composed of<code>UIView</code>.</p>
  
  <p>Thus I planed to convert the code to <code>UIView</code> and try to separate the view &amp; controller.</p>
  
  <p>Just wonder the performance between the 2 mode.</p>
  
  <p>Is there comparation or test of performance difference for <code>XIB UIView</code> and <code>code generated UIView</code>?</p>