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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=580219" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:134.0) Gecko/20100101 Firefox/134.0
Browser:
Firefox 134
Operating system:
Ubuntu
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
ClassName
146K/s
classList.value
99K/s
setAttribute(...)
83K/s
classList.add(...)
46K/s
View exact numbers
Test name
Executions per second
✓
ClassName
146,019 Ops/sec
classList.value
98,524 Ops/sec
setAttribute(...)
82,555 Ops/sec
classList.add(...)
45,574 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"; }