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Run results for:
getComputedStyle vs. className vs. className / contains
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<iframe src="https://measurethat.net/Embed?id=591013" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36
Browser:
Chrome 133
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
className
20K/s
classList.contains
6K/s
getComputedStyle
473/s
View exact numbers
Test name
Executions per second
✓
className
19,526 Ops/sec
classList.contains
6,104 Ops/sec
getComputedStyle
473 Ops/sec
HTML Preparation code:
<div id="foo"></div>
Tests:
getComputedStyle
var i = 3000; var el = document.getElementById('foo'); while (i--) { chekele(el); } function chekele(element) { return window.getComputedStyle(element, null).getPropertyValue("display").indexOf('none') === -1; }
className
var i = 3000; var el = document.getElementById('foo'); while (i--) { chekele(el); } function chekele(element) { return element.className.indexOf('hide') === -1; }
classList.contains
var i = 3000; var el = document.getElementById('foo'); while (i--) { chekele(el); } function chekele(element) { return element.classList.contains('hide'); }