Run results for: DataAttribute vs Class Selector vs ID Selector

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; TECNO BD2d) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.104 Mobile Safari/537.36 OPR/67.1.3508.63168

Browser: Opera Mobile 67

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Class	175136.4 Ops/sec
ID	119851.7 Ops/sec
data attribute	101862.2 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