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Run results for:
className vs. classList
Fork from https://measurethat.net/Benchmarks/Show/54/0/classname-vs-setattribute-vs-classlist
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Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=594100" 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/134.0.0.0 Safari/537.36 Edg/134.0.0.0
Browser:
Chrome 134
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
className =
4K/s
className +=
4K/s
classList
2K/s
View exact numbers
Test name
Executions per second
✓
className =
3,742 Ops/sec
className +=
3,541 Ops/sec
classList
1,776 Ops/sec
HTML Preparation code:
<div id="foo"></div>
Tests:
className =
var element = document.getElementById('foo'); var i = 1000; while (i--) { element.className = 'bar'; element.className = ''; }
className +=
var element = document.getElementById('foo'); var i = 1000; while (i--) { element.className += ' bar'; element.className = ''; }
classList
var element = document.getElementById('foo'); var i = 1000; while (i--) { element.classList.add('bar'); element.className = ''; }