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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="container">
    <ul>
        <li>1</li>
        <li class="target">2</li>
        <li>3</li>
    </ul>
</div><script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

Setup JS

Teardown JS

Test cases

Test #1

Title *

Async

Code *$('div#container ul li.target').css('border','1px solid red');

Test #2

Title *

Async

Code *$('#container .target').css('border','1px solid red');

Test #3

Title *

Async

Code *$('li.target').css('border','1px solid red');

Test #4

Title *

Async

Code *$('.target').css('border','1px solid red');