Run results for: DataAttribute vs Class Selector vs ID Selector

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/96.0.4664.94 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 96

Operating system: iOS 15.2

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Class	3479272.8 Ops/sec
ID	3114047.0 Ops/sec
data attribute	3045567.0 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]');

Run results for: DataAttribute vs Class Selector vs ID Selector

Class

ID

data attribute