getElementById vs. querySelector

JavaScript performance comparison

Revision 42 of this test case created

Info

Compare the speed of getElementById to querySelector

Preparation code

<p class="foo">Foo</p>
<p class="bar">Bar</p>
<p class="foo">Baz</p>

Preparation code output

Foo

Bar

Baz

Test runner

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Testing in unknown unknown
Test Ops/sec
getElementByClassName
var bar = document.getElementsByClassName('foo')
pending…
querySelector
var bar = document.querySelector(".foo");
pending…

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