Run results for: classList.contains vs className.indexof

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

Browser: Chrome 118

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
classList.contains	1643375.9 Ops/sec
className.indexof	1878802.2 Ops/sec

HTML Preparation code:

<div id="css" class="css1 css2 css3 css4"></div>

Tests: