Run results for: ClassList has add or direct add

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
check has and add class	13532682.0 Ops/sec
Direct add class	2871587.5 Ops/sec

HTML Preparation code:

<div class="el"></div>

Script Preparation code:

var el = document.querySelector('.el')

Tests:

check has and add class
!el.classList.contains('el') && el.classList.add('el') !el.classList.contains('el2') && el.classList.add('el2')
Direct add class
el.classList.add('el') el.classList.add('el2')