Run results for: classList.add vs setAttribute

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/119.0

Browser: Firefox 119

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
setAttribute	10230480.0 Ops/sec
classList.add	4973870.5 Ops/sec

HTML Preparation code:

<div id="test">Testing</div>

AخA
 
<div id="test">Testing</div>

Script Preparation code:

var el = document.getElementById('test');

 
var el = document.getElementById('test');

Tests:

setAttribute
el.setAttribute('mytest', 'true')
el.setAttribute('mytest', 'true')
classList.add
el.classList.add('mytest')
el.classList.add('mytest')