Run results for: window.getComputedStyle vs. className2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:90.0) Gecko/20100101 Firefox/90.0

Browser: Firefox 90

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
getComputedStyle	191.7 Ops/sec
className	803.6 Ops/sec

HTML Preparation code:

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

Tests:

getComputedStyle
var i = 3000; var div = document.getElementsByClassName('foo')[0]; while (i--) { chekele(div); } function chekele(element) { return window.getComputedStyle(element, null).display.indexOf('none') === -1; }
className
var i = 3000; while (i--) { chekele('foo'); } function chekele(element) { return document.getElementsByClassName(element)[0].className.indexOf('hide') === -1; }