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Run results for:
DataAttribute vs Class Selector vs ID Selector
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Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 17
Operating system:
iOS 17.5.1
Device Platform:
Mobile
Date tested:
2 years ago
Class
5.2M/s
ID
4.3M/s
data attribute
4.1M/s
View exact numbers
Test name
Executions per second
✓
Class
5,218,539 Ops/sec
ID
4,325,064 Ops/sec
data attribute
4,083,286 Ops/sec
HTML Preparation code:
<div class="hello" id="hello" data-hello>Hello</div>
Tests:
Class
document.querySelector('.hello');
ID
document.querySelector('#hello');
data attribute
document.querySelector('[data-hello]');