Run results for: className vs setAttribute vs classList

Run details:

User agent: Mozilla/5.0 (Android 10; Mobile; rv:131.0) Gecko/131.0 Firefox/131.0

Browser: Firefox Mobile 131

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

className

13K/s

setAttribute

9K/s

classList

3K/s

View exact numbers

HTML Preparation code:

<div id="foo"></div>

Script Preparation code:

var element = document.getElementById('foo');

Tests:

className
var i = 1000; while (i--) { element.className = "bar"; }
setAttribute
var i = 1000; while (i--) { element.setAttribute("class", "bar"); }
classList
var i = 1000; while (i--) { element.classList.add("bar"); }