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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>qooxdoo » Demo » Sample</title>
<link type="text/css" rel="stylesheet" href="../../css/layout.css"/>
<!--[if IE]>
<link type="text/css" rel="stylesheet" href="../../css/layout_ie.css"/>
<![endif]-->
<script type="text/javascript" src="../../script/sample.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 (globally stored). After this create 10.000 new (non stored) objects inside a loop.</p>
<p>Use removeAll to clean up global storage after first loop.</p>
<h1>Result</h1>
<p>The additional cleanup (remove all entries) of the global storage optimizes performance after the first loop. First loop is done after ~1150ms. The following loop needs ~490ms. Not bad, but poorly compared to the version, where the storage have never exist before. (See first examples, which executes in ~350ms.)</p>
<p>It makes no difference if we use a global or a local variable here. It's identical to LocalObject_3.html.</p>
</div>
<script type="text/javascript">
qx.core.Init.getInstance().defineMain(function()
{
window.store = [];
for (var i=0; i<50000; i++) {
window.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();
qx.lang.Array.removeAll(window.store);
});
</script>
</body>
</html>
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