class-vs-data

JavaScript performance comparison

Revision 2 of this test case created by jj

Info

Class selector vs Data attribute selector

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js">
</script>
<div class="test" id="test" data-test="test">
</div>
<div class="test" id="test" data-test="test">
</div>
<div class="test" id="test" data-test="test">
</div>
<div class="test" id="test" data-test="test">
</div>
<div class="test" id="test" data-test="test">
</div>
<div class="test" id="test" data-test="test">
</div>
<div class="test" id="test" data-test="test">
</div>
<div class="test" id="test" data-test="test">
</div>
<div class="test" id="test" data-test="test">
</div>
<div class="test" id="test" data-test="test">
</div>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
Class selector
$(".test")
pending…
Data selector
$("[data-test]")
pending…
id selector
$("#test")
pending…

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