title: UIView clipsToBounds property: Does it improve performance?
body: <p>The documentation says that the <code>clipsToBounds</code> property of <code>UIView</code> will clip the drawing to the bounds, or more precisely that the <code>subView</code> can't draw outside of the bounds of the <code>superView</code>.</p>
  
  <p>Sounds nice, but what does that mean in practice? </p>
  
  <p>If I set that to <strong>YES</strong>, then my <code>subView</code> will automatically only draw those parts which are not outside the bounds of the <code>superView</code>. so it increases the overall performance or do I still have to make sure that I don't create any views that are not visible, i.e. inside a <code>UIScrollView</code> ?</p>