id vs class vs attr selectors

JavaScript performance comparison

Revision 196 of this test case created by Keith Chu

Preparation code

<div class="baz">
<p id="js-foo" class="js-foo" data-js="tabs"></p>
</div>

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
 

Preparation code output

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Test Ops/sec
[data-js=tabs]
var element = $('[data-js=tabs]')
pending…
[data-js]
var element = $('[data-js]')
pending…
$('.baz').find('[data-js=tabs]')
var element = $('.baz').find('[data-js=tabs]')
pending…

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