perf profile

perf profiling.js

    (function() {
      var script = document.createElement('script')
      script.onload = function() {
        var stats = new Stats()
        stats.showPanel(1)
        document.body.appendChild(stats.dom)
        requestAnimationFrame(function loop() {
          stats.update()
          requestAnimationFrame(loop)
        })
      }
      script.src = 'http://rawgit.com/mrdoob/stats.js/master/build/stats.min.js'
      document.head.appendChild(script)
    })()