Run results for: setAttribute vs classList.add (attribute adding)

Run details:

User agent: Mozilla/5.0 (Android 11; Mobile; rv:96.0) Gecko/96.0 Firefox/96.0

Browser: Firefox Mobile 96

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
classList.add	2192648.0 Ops/sec
setAttribute	1540.3 Ops/sec

HTML Preparation code:

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

Script Preparation code:

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

Tests: