Run results for: DataAttribute vs Class Selector vs ID Selector

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/110.2 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 16

Operating system: iOS 16.1.1

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Class	5772961.5 Ops/sec
ID	4781270.0 Ops/sec
data attribute	4805674.0 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