title: html canvas animation stutter
body: <p>Can anyone explain why the provided canvas animation stutters?  I've created a test stub which demonstrates the problem.  </p>
  
  <p>I see the stutter in FF, Chrome, IE on desktop and in FF and Chrome on Android.</p>
  
  <p>Is the stutter due to garbage collection?  It seems even raf generates a double on each call which eventually requires gc.  If gc is the cause then html5 animation is pretty much doa.  Sigh.</p>
  
  <p>The same question was asked a year ago but because I'm a new member I'm not able to contact the author to find out his solution. <a href="https://stackoverflow.com/questions/14390669/html5-canvas-drawimage-stutter-choppiness">HTML5 Canvas DrawImage Stutter / Choppiness</a> . It is really too bad there is no way for a new user to get another user's attention, since the author of that other question may have the information I'm looking for, an simply hasn't posted it.  I tried posting to his question in an effort to get his attention, but my post there was deleted as a rules violation(which is was).  Guess I'm out of options.  Chicken and egg problem with rep.</p>