swat/apps/qooxdoo-examples/performance/TypeCheck_1.html

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  14   <div id="demoDescription">
  15     <p>Tests for typical value checks and their performance.</p>
  16     <ol>
  17       <li>Typeof with Strings</li>
  18       <li>Typeof with Constants</li>
  19       <li>Instanceof</li>
  20     </ol>
  21   </div>
  22
  23   <script type="text/javascript">
  24   qx.core.Init.getInstance().defineMain(function()
  25   {
  26     var STR = "string";
  27     var NR = "number";
  28     var OBJ = "object";
  29
  30     var str = "Hello World"
  31     var nr1 = 1000;
  32     var nr2 = Infinity;
  33     var nr3 = NaN;
  34     var nr4 = 0.432;
  35     var obj1 = {};
  36     var obj2 = { key1 : "hello world", key2 : "hello world", key3 : "hello world" }
  37
  38     function typeCheckTypeof1(vLoops)
  39     {
  40       for (var i=0; i<vLoops; i++)
  41       {
  42         typeof str === "string";
  43         typeof nr1 === "number";
  44         typeof nr2 === "number";
  45         typeof nr3 === "number";
  46         typeof nr4 === "number";
  47         typeof obj1 === "object";
  48         typeof obj2 === "object";
  49       }
  50     }
  51
  52     function typeCheckTypeof2(vLoops)
  53     {
  54       for (var i=0; i<vLoops; i++)
  55       {
  56         typeof str === STR;
  57         typeof nr1 === NR;
  58         typeof nr2 === NR;
  59         typeof nr3 === NR;
  60         typeof nr4 === NR;
  61         typeof obj1 === OBJ;
  62         typeof obj2 === OBJ;
  63       }
  64     }
  65
  66     function typeCheckInstanceOf(vLoops)
  67     {
  68       for (var i=0; i<vLoops; i++)
  69       {
  70         str instanceof String
  71         nr1 instanceof Number
  72         nr2 instanceof Number
  73         nr3 instanceof Number
  74         nr4 instanceof Number
  75         obj1 instanceof Object
  76         obj2 instanceof Object
  77       }
  78     }
  79
  80     new qx.dev.TimeTracker(typeCheckTypeof1, typeCheckTypeof2, typeCheckInstanceOf);
  81   });
  82   </script>
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