id vs class vs tag selectors

JavaScript performance comparison

Revision 80 of this test case created by

Preparation code

<p id="foo" class="foo"></p>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    

Preparation code output

<p id="foo" class="foo"></p>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
tag
var element = document.getElementsByTagName('p');
pending…
id
var element = document.getElementById('foo');
pending…
class
var element = document.getElementsByClassName('foo');
pending…
$(id)
var element = $('#foo');
pending…
$(class)
var element = $('.foo');
pending…
$(tag)
var element = $('p');
pending…

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