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Run results for:
Class Selector vs ID Selector vs Data Attribute Selector Performance Test
Class Selector vs ID Selector vs Data Attribute Selector Performance Test
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<iframe src="https://measurethat.net/Embed?id=534209" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
Browser:
Chrome 126
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
Class
4274053.5 Ops/sec
ID
2973556.2 Ops/sec
Data Attribute
2866223.5 Ops/sec
Data Attribute Exact
2018064.6 Ops/sec
HTML Preparation code:
<div class="hello" id="hello" data-hello="some long long long long value" data-test="hello-and-bye">Hello</div> >Hello</div>
Tests:
Class
document.querySelector('.hello');
ID
document.querySelector('#hello');
Data Attribute
document.querySelector('[data-hello]');
Data Attribute Exact
document.querySelectorAll('[data-test="hello-and-bye"]')