requestAnimationFrame con polyfill

gistfile1.js

// shim con fallback a setTimeout 
window.requestAnimFrame = (function(){
  return  window.requestAnimationFrame       || 
          window.webkitRequestAnimationFrame || 
          window.mozRequestAnimationFrame    || 
          window.oRequestAnimationFrame      || 
          window.msRequestAnimationFrame     || 
          function( callback ){
            window.setTimeout(callback, 1000 / 60);
          };
})();
 
// uso: 
// en lugar de setInterval(render, 16) ....
 
(function loopAnimacion(){
  requestAnimFrame(loopAnimacion);
  hazLosCalculos();
})();