Benchmark: setAttribute vs classList.add (attribute adding)

HTML Preparation code:

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

Script Preparation code:

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

Tests:

Rendered benchmark preparation results:

Previous results

Test case name	Result
classList.add
setAttribute

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Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:122.0) Gecko/20100101 Firefox/122.0

Browser/OS: Firefox 122 on Windows

Test name	Executions per second
classList.add	8051141.0 Ops/sec
setAttribute	2313.2 Ops/sec

setAttribute vs classList.add (attribute adding) (version: 0)