Run results for: className.split(" ") vs. classList.values()

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0

Browser: Firefox 131

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
className	3273585.0 Ops/sec
classList	914307.3 Ops/sec

HTML Preparation code:

<div id="foo" class="a b c d e f      g h i j k l m n o p q     r s t u v w x y z"></div>

Tests:

className
document.getElementById("foo").className.split(" ").find(x => x === 'z')
classList
document.getElementById("foo").classList.values().find(x => x === 'z')