Run results for: classList.add vs setAttribute

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Browser: Chrome 139

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 10 months ago

classList.add

11.6M/s

setAttribute

5.4M/s

View exact numbers

Test name	Executions per second
✓ classList.add	11,639,783 Ops/sec
setAttribute	5,387,300 Ops/sec

HTML Preparation code:

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

Script Preparation code:

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

Tests: