Run results for: getAttribute/setAttribute versus classList

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:73.0) Gecko/20100101 Firefox/73.0

Browser: Firefox 73

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
setAttribute/getAttribute	980110.6 Ops/sec
classList	751645.0 Ops/sec

HTML Preparation code:

<div class='testName'>TEST HERE</div>

AخA
 
<div class='testName'>TEST HERE</div>

Tests:

setAttribute/getAttribute
const el = document.querySelector('div') el.setAttribute('name', el.getAttribute('class') + ' testClass2')
const el = document.querySelector('div')
el.setAttribute('name', el.getAttribute('class') + ' testClass2')
classList
const el = document.querySelector('div') el.classList.add('testClass2')
const el = document.querySelector('div')
el.classList.add('testClass2')