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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=599631" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36
Browser:
Chrome 134
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
getElementsByClassName
13.5M/s
getElementById
13.3M/s
querySelector
9.9M/s
View exact numbers
Test name
Executions per second
✓
getElementsByClassName
13,463,329 Ops/sec
getElementById
13,324,125 Ops/sec
querySelector
9,885,544 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;