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jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

jsperf.com URLs are mirrored at the same path, e.g:

https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

Test case details

Title *

Description
(Markdown syntax is allowed)

Preparation Code

Preparation HTML
(this will be inserted in the <body> of a valid HTML5 document in standards mode)
(useful when testing DOM operations or including libraries)

<div id="hello"><div class="bye"></div></div>
<script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-2.1.0.min.js"></script>

Setup JS

Teardown JS

Test cases

Test #1

Title *

Async

Code *var $el = $('#hello');

Test #2

Title *

Async

Code *var $el = document.getElementById('hello');

Test #3

Title *

Async

Code *var $el = document.querySelector('#hello');

Test #4

Title *

Async

Code *var $el = $('.bye');

Test #5

Title *

Async

Code *var $el = document.getElementsByClassName('bye');

Test #6

Title *

Async

Code *var $el = document.querySelectorAll('.bye');

Test #7

Title *

Async

Code *var $el = $('#hello .bye');

Test #8

Title *

Async

Code *var $el = document.querySelectorAll('#hello .bye');

Test #9

Title *

Async

Code *

var $el = document.getElementsByClassName('bye');
$el = $el.getElementById('hello');