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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)

<span class="irrelevant class4 irrelevant2">Element</span>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

Setup JS

var element = $('span');
  var el = document.querySelector('span');

Teardown JS

Test cases

Test #1

Title *

Async

Code *

if (element.hasClass('class4')) {
  console.log("hasClass");
}

Test #2

Title *

Async

Code *

if (element.is('.class4')) {
  console.log("is");
}

Test #3

Title *

Async

Code *

if(element.attr('class').match(/class4/) ) {
  console.log("match");
}

Test #4

Title *

Async

Code *

if ( el.getAttribute('class').match(/class4/) ) {
  console.log("className");
}

Test #5

Title *

Async

Code *

if ( el.className.match(/class4/) ) {
  console.log("className");
}

Test #6

Title *

Async

Code *

if ( element[0].className.match(/class4/) ) {
  console.log("className");
}

Test #7

Title *

Async

Code *

if ( element[0].getAttribute('class').match(/class4/) ) {
  console.log("className");
}