id vs class vs attr selectors

JavaScript performance comparison

Revision 189 of this test case created

Preparation code

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

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

Preparation code output

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Testing in unknown unknown
Test Ops/sec
id
var element = $('#js-foo');
pending…
class
var element = $('.js-foo');
pending…
$(data-attr)
var element = $('[data-js="tabs"]')
pending…
queryselector id
var element = document.querySelector('#js-foo')
pending…
queryselectorall class
var element = document.querySelectorAll('.js-foo')
pending…
queryselectorall data-attr
var element = $('[data-js="tabs"]')
pending…

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