Run results for: querySelector with html tag vs querySelector only class

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36

Browser: Chrome 89

Operating system: Mac OS X 11.2.1

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
querySelector with html tag	2985469.0 Ops/sec
querySelector only class	2703864.0 Ops/sec

HTML Preparation code:

<div class="js-test"></div>

Tests:

querySelector with html tag
var $el = document.querySelector('.js-test'); var className = $el.className;
querySelector only class
var $el = document.querySelector('div.js-test'); var className = $el.className;