title: How to find the cause of a 100% CPU usage on an iPhone App
body: <p>I've diagnosed a strange behavior in an app : after 10 minutes or so, the CPU usage goes to 100%. There's no leak in the app, and it happens while the app is doing nothing.</p>
  
  <p>I can profile this with instruments using the "Time Profiler", but is there a way to find what the actual cause is ?</p>