Run results for: setAttribute vs classList.add (attribute adding) V2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36 Edg/135.0.0.0

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

classList.add

4.1M/s

setAttribute

3K/s

View exact numbers

Test name	Executions per second
✓ classList.add	4,131,483 Ops/sec
setAttribute	2,752 Ops/sec

HTML Preparation code:

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

Script Preparation code:

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

Tests: