querySelector vs querySelectorAll vs getElementById vs getElementsByClassName vs getElementsByTagName

JavaScript performance comparison

Revision 17 of this test case created by

Preparation code

<p id="foo" class="foo">
  <span class="bar"><span>,,,</span></span>
</p>
    

Preparation code output

<p id="foo" class="foo"> <span class="bar"><span>,,,</span></span> </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
queryselector
document.querySelector("p .bar");
pending…
elementselector
var test = document.getElementsByTagName('p');

test.getElementsByClassName('bar');
pending…
querySelector Id
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

,,,