Run results for: classList.contains() vs closest() performance

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:149.0) Gecko/20100101 Firefox/149.0

Browser: Firefox 149

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 2 months ago

contains

62.0M/s

closest

10.9M/s

View exact numbers

Test name	Executions per second
✓ contains	62,023,052 Ops/sec
closest	10,920,308 Ops/sec

HTML Preparation code:

<div class='div1'>
  <div class='div2'>
    <div class='div3'>
    </div>
  </div>
</div>

Script Preparation code:

var box = document.querySelector('.div1')
var clicked = document.querySelector('.div3')

Tests: