Run results for: is id VS classList.contains

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0

Browser: Firefox 78

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
classList	13949.6 Ops/sec
id chekc	222752.8 Ops/sec

HTML Preparation code:

<div id="some-id" class="c1 c2 c3 c4"></div>

Script Preparation code:

window.el = document.querySelector('#some-id');

Tests:

classList
for (let i = 0, l = 1000; i <= l; i++) { const isMatch = el.classList.contains('c1'); }
id chekc
for (let i = 0, l = 1000; i <= l; i++) { const isMatch = el.id === 'some-id'; }