documentVSelement_querySelector

JavaScript performance comparison

Revision 2 of this test case created

Info

Compares the performance of a querySelector at the document level vs element level.

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div id="test">
<section>
   <span></span>
</section>
   <span></span>
<div>
<script>
Benchmark.prototype.setup = function() {
    var testEl = document.getElementById("test");
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
document.querySelector
document.querySelector("span")
pending…
element.querySelector
testEl.querySelector("span")
pending…
jquery()
$('span', '#test')
pending…
jquery find()
$('#test').find('span')
pending…
jquery find with object
$(testEl).find('span')
pending…
Re-selector
var testElement = document.getElementById("test");
testElement.querySelector("span");
pending…

Compare results of other browsers

Revisions

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