Run results for: getAttribute vs className

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36

Browser: Chrome 75

Operating system: Mac OS X 10.14.5

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
className	96360.2 Ops/sec
getAttribute	26923.3 Ops/sec

HTML Preparation code:

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

Tests:

className
var element = document.getElementById("foo"); var class_name; var i = 1000; while (i--) { class_name = element.className; }
getAttribute
var element = document.getElementById("foo"); var class_name; var i = 1000; while (i--) { class_name = element.getAttribute('class'); }