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

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:107.0) Gecko/20100101 Firefox/107.0

Browser: Firefox 107

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
classList.add	2558154.8 Ops/sec
setAttribute	1745.4 Ops/sec

HTML Preparation code:

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

Script Preparation code:

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

Tests: