Run results for: DataAttribute vs Class Selector vs ID Selector vs getElementById vs getElementsByClassName - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0

Browser: Firefox 120

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Class	3306890.5 Ops/sec
ID	3291698.8 Ops/sec
data attribute	3107549.0 Ops/sec
getElementById	5293324.0 Ops/sec
getElementsByClassName	3393544.0 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]');
getElementById
document.getElementById('hello');
getElementsByClassName
document.getElementsByClassName('hello')[0];

;