title: Does print() / println() slow execution?
body: <p>I have an app with a couple of thousand lines and within that code there are a lot of println() commands.  Does this slow the app down?  It is obviously being executed in the Simulator, but what happens when you archive, submit and download the app from the app store/TestFlight.  Is this code still "active", and what about code that is "commented out"?  </p>
  
  <p>Is it literally never read or should I delete commented out code when I submit to test flight/app store?</p>