Run results for: className vs classList by Tyler

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.53 Safari/537.36

Browser: Chrome 72

Operating system: Windows 7

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
ClassList	1268008.0 Ops/sec
className	2141343.0 Ops/sec

HTML Preparation code:

<div id="foo">Hello</div>

Tests:

ClassList
let element = document.getElementById("foo"); element.classList.add("foo", "bar");
className
let element = document.getElementById("foo"); element.className = "foo bar";