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-<html>
-<head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
- <title>qooxdoo &raquo; Demo</title>
- <link type="text/css" rel="stylesheet" href="../../resource/css/layout.css"/>
- <!--[if IE]>
- <link type="text/css" rel="stylesheet" href="../../resource/css/layout_ie.css"/>
- <![endif]-->
- <script type="text/javascript" src="../../script/qx.js"></script>
-</head>
-<body>
- <script type="text/javascript" src="../../script/layout.js"></script>
-
- <div id="demoDescription">
- <p>JS Object Storage Performance</p>
-
- <h1>Test Description</h1>
- <p>Precreate 50.000 objects (locally stored). After this create 10.000 new (not stored) objects inside a loop.</p>
- <p>As the loop will be executed inside the scope of "store", the browser must keep the information about "store" with each execution of "test", even if called from the timeout.</p>
-
- <h1>Result</h1>
- <p>The performance in IE is poor (~1150ms for each loop), compared to the same stuff executed without so much precreated objects (previous example).</p>
- <p>It makes no difference if we use a global or a local variable here. It's identical to GlobalObject_2.html.</p>
- </div>
-
- <script type="text/javascript">
- qx.core.Init.getInstance().defineMain(function()
- {
- var store = [];
-
- for (var i=0; i<50000; i++) {
- store.push({});
- };
-
- function test()
- {
- var _s = (new Date).valueOf();
-
- for (var i=0; i<10000; i++) {
- new Object()
- };
-
- window.status = "time: " + (new Date).valueOf() + " | measured: " + ((new Date).valueOf() - _s) + "ms";
- window.setTimeout(test, 1000);
- }
-
- test();
- });
- </script>
-</body>
-</html>