id vs class vs tag selectors

JavaScript performance comparison

Revision 187 of this test case created

Preparation code

<p id="foo" class="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 = document.getElementById('foo');
pending…
class
var element = document.getElementsByClassName('foo');
pending…
tag
var element = document.getElementsByTagName('p');
pending…
$(attr)
var element = $('[data-js="tabs"]')
pending…
queryselector id
var element = document.querySelector('#foo')
pending…
queryselectorall class
var element = document.querySelectorAll('.foo')
pending…
queryselectorall attr
var element = document.querySelectorAll('[data-js="tabs"]')
pending…

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