Run results for: DataAttribute vs Class Selector vs ID Selector vs Tag vs :is() - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Class	7165823.0 Ops/sec
ID	6876901.5 Ops/sec
data attribute	6081461.0 Ops/sec
:is(div, span)	3467519.2 Ops/sec
Tag	6803553.5 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]');
:is(div, span)
document.querySelector(':is(div,span)');
Tag
document.querySelector('div');