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Run results for:
className vs. setAttribute vs. classList
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=578399" 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/131.0.0.0 Safari/537.36
Browser:
Chrome 131
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
className
30.7M/s
setAttribute
20.2M/s
classList
11.0M/s
View exact numbers
Test name
Executions per second
✓
className
30,689,522 Ops/sec
setAttribute
20,164,368 Ops/sec
classList
11,047,439 Ops/sec
HTML Preparation code:
<div id="foo"></div>
Script Preparation code:
var element = document.getElementById("foo");
Tests:
className
element.className = "bar";
setAttribute
element.setAttribute("class", "bar");
classList
element.classList.add("bar");