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Run results for:
getElementById vs querySelector vs getElementsByClassName v2
Test performance of different ways of get just one particular DOM element
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=625138" 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/145.0.0.0 Safari/537.36
Browser:
Chrome 145
Operating system:
Windows
Device Platform:
Desktop
Date tested:
7 months ago
Benchmark engine:
Benchmark.js
getElementsByClassName
6.2M/s
getElementById
6.1M/s
querySelector
5.5M/s
View exact numbers
Test name
Executions per second
✓
getElementsByClassName
6,249,308 Ops/sec
getElementById
6,132,273 Ops/sec
querySelector
5,541,710 Ops/sec
HTML Preparation code:
<div id="unique" class="unique" name="unique" data-unique="1">test</div>
Script Preparation code:
var uniques = document.getElementsByClassName('unique');
Tests:
getElementById
var test = document.getElementById('unique').innerHTML;
querySelector
var test = document.querySelector('.unique').innerHTML;
getElementsByClassName
var test = uniques[0].innerHTML;