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Run results for:
setAttribute(...) vs. classList.add(...) vs classList.value vs className
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=529269" 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/125.0.0.0 Safari/537.36
Browser:
Chrome 125
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
ClassName
133K/s
classList.value
101K/s
setAttribute(...)
76K/s
classList.add(...)
56K/s
View exact numbers
Test name
Executions per second
✓
ClassName
133,388 Ops/sec
classList.value
101,285 Ops/sec
setAttribute(...)
76,009 Ops/sec
classList.add(...)
56,190 Ops/sec
HTML Preparation code:
<div id="foo"></div>
Tests:
setAttribute(...)
var element = document.getElementById("foo"); var i = 100; while (i--) { element.setAttribute("class", "bar"); }
classList.add(...)
var element = document.getElementById("foo"); var i = 100; while (i--) { element.classList.add("bar"); }
classList.value
var element = document.getElementById("foo"); var i = 100; while (i--) { element.classList.value = "bar"; }
ClassName
var element = document.getElementById("foo"); var i = 100; while (i--) { element.className = "bar"; }