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

Run details:

User agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:107.0) Gecko/20100101 Firefox/107.0

Browser: Firefox 107

Operating system: Windows 8.1

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Class	3714058.8 Ops/sec
ID	3548374.0 Ops/sec
data attribute	2096218.1 Ops/sec
attribute selector ~ one	1888051.5 Ops/sec
attribute selector ~ second	1875679.8 Ops/sec

HTML Preparation code:

<div class="hello" id="hello" data-hello="foo bar baz">Hello</div>

Tests:

Class
document.querySelector('.hello');
ID
document.querySelector('#hello');
data attribute
document.querySelector('[data-hello]');
attribute selector ~ one
document.querySelector('[data-hello~="foo"]');
attribute selector ~ second
document.querySelector('[data-hello~="bar"]');