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<title>qooxdoo » Demo</title>
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<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>
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