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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)

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="http://d3js.org/d3.v3.js"></script>
<section id = "main">
  <div class = "one">
    <p> One </p>
  </div>
  <div class = "two">
    <p> Two </p>
  </div>
</section>

Setup JS

Teardown JS

Test cases

Test #1

Title *

Async

Code *

$('#main .one').find($('div')).remove();
$('#main .one').css("color", "red").append("<div>test</div>");

Test #2

Title *

Async

Code *

d3.select("div").remove()
d3.select("#main .one").style("color", "red").append("div").text("test")