Run results for: classList.contains VS className.includes

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36

Browser: Chrome 100

Operating system: Mac OS X 10.13.6

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
className.includes	1816.8 Ops/sec
classList.contains	939.4 Ops/sec

HTML Preparation code:

<div id="foo" class="test"></div>

Tests:

className.includes
let el = document.getElementById("foo"), i = 10000; while (i--) { el.className?.includes("test"); }
classList.contains
let el = document.getElementById("foo"), i = 10000; while (i--) { el.classList?.contains("test"); }