Run results for: DataAttribute vs Class Selector vs ID Selector

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; SAMSUNG SM-G960N/KSU4FUE1) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/14.0 Chrome/87.0.4280.141 Mobile Safari/537.36

Browser: Chrome Mobile 87

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
Class	1116051.5 Ops/sec
ID	837323.4 Ops/sec
data attribute	501616.4 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