Run results for: getAttribute vs. classList

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36

Browser: Chrome 76

Operating system: Linux

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
classList	2785708.0 Ops/sec
getAttribute	3169242.0 Ops/sec

HTML Preparation code:

<div id="foo" data-name="bar"></div>

Tests:

classList
var element = document.getElementById("foo"); var i = 1000; while (i--) { return element.classList[0]; }
getAttribute
var element = document.getElementById("foo"); var i = 1000; while (i--) { return element.getAttribute("data-name"); }