getElementById vs. querySelector

JavaScript performance comparison

Revision 60 of this test case created by

Preparation code

<script src="https://code.jquery.com/jquery-2.0.3.min.js"></script>
<p id="foo">Foo</p>
<p id="bar" class="bar" data-role="foo">Bar</p>
<p id="baz">Baz</p>
    

Preparation code output

<p id="foo">Foo</p> <p id="bar" class="bar" data-role="foo">Bar</p> <p id="baz">Baz</p>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
getElementById
var bar = document.getElementById("bar");
pending…
querySelector
var bar = document.querySelector("[data-role]");
pending…
Class
var bar = document.getElementsByClassName("bar");
pending…
jQuery Class
var bar = $('.bar');
pending…
jQuery attr
var bar = $('[data-role]');
pending…

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Revisions

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Foo

Bar

Baz