webapps/qooxdoo-0.6.3-sdk/frontend/demo/source/html/performance/GlobalObject_4.html

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   4   <title>qooxdoo &raquo; Demo</title>
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  11 <body>
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  13
  14   <div id="demoDescription">
  15     <p>JS Object Storage Performance</p>
  16
  17     <h1>Test Description</h1>
  18     <p>Precreate 50.000 objects (globally stored). After this create 10.000 new (non stored) objects inside a loop.</p>
  19     <p>Overwrite global storage to clean up after first loop.</p>
  20
  21     <h1>Result</h1>
  22     <p>The additional cleanup (overwrite with null) of the global storage optimizes performance after the first loop. First loop is done after ~1150ms. The following loop needs ~350ms. Quite good. The same value as in the first example, where the data have never exist.</p>
  23   </div>
  24
  25   <script type="text/javascript">
  26   qx.core.Init.getInstance().defineMain(function()
  27   {
  28     window.store = [];
  29
  30     for (var i=0; i<50000; i++) {
  31       window.store.push({});
  32     };
  33
  34     function test()
  35     {
  36       var _s = (new Date).valueOf();
  37
  38       for (var i=0; i<10000; i++) {
  39         new Object()
  40       };
  41
  42       window.status = "time: " + (new Date).valueOf() + " | measured: " + ((new Date).valueOf() - _s) + "ms";
  43       window.setTimeout(test, 1000);
  44     }
  45
  46     test();
  47
  48     window.store = null;
  49   });
  50   </script>
  51 </body>
  52 </html>