performance-tuning-$5.lzx

<canvas height="150" width="100%">
    <include href="utils/performance"/>
    <script>
      var iterations = Measurement.defaultIterations;
      var testIndexes={};
      for (var i = 0; i < iterations; i++) {
        testIndexes[i] = i.toString();
      }

      function empty () {
      }

      function measureFor () {
        for (var j = 0; j < iterations; j++ ) {
          testIndexes[j];
        }
      }

      function measureForIn () {
        for (var j in testIndexes ) {
          testIndexes[j];
        }
      }

      function measureWhile () {
        var j = 0;
        while (j < iterations) {
          testIndexes[j++];
        }
      }

      (new Measurement({'for': measureFor,
                        'for in': measureForIn,
                        'while':  measureWhile,
                        'empty': empty})).run();
    </script>
  </canvas>
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