performance-tuning-$9.lzx

<canvas height="150" width="100%">
    <include href="utils/performance"/>
    <script>
      var iterations = Measurement.defaultIterations;
      var x;

      function empty () {
        for (var i = 0; i < iterations; i++) 
          ;
      }

      var myObj = { a: 'eh?', b: 'be',
                    c: { d: 'dee',
                         e: { f: 'eff',
                              g: { h: 'ache'}}}}

      function measureHardWay () {
        var ans;
        for (var i = 0; i < iterations; i++) {
          ans = a.c.e.g.h;
        }
      }

      function measureEasyWay () {
        var ans;
        var aceg = a.c.e.g;
        for (var i = 0; i < iterations; i++) {
          ans = aceg.h;
        }
      }

      (new Measurement({'in the loop': measureHardWay,
                        'out of the loop': measureEasyWay,
                        'empty': empty})).run();
    </script>
  </canvas>
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