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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=570149" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0
Browser:
Firefox 132
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
ClassName
193K/s
setAttribute(...)
143K/s
classList.value
139K/s
classList.add(...)
76K/s
View exact numbers
Test name
Executions per second
✓
ClassName
193,189 Ops/sec
setAttribute(...)
142,570 Ops/sec
classList.value
139,428 Ops/sec
classList.add(...)
75,563 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"; }