getElementById vs. querySelector

JavaScript performance comparison

Revision 42 of this test case created by

Preparation code

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

Preparation code output

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

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
getElementByClassName
var bar = document.getElementsByClassName('foo')
pending…
querySelector
var bar = document.querySelector(".foo");
pending…

Compare results of other browsers

Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL.

0 Comments

Foo

Bar

Baz