Run results for: jQuery 2.1.4 selector vs document.querySelector

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36

Browser: Chrome 65

Operating system: Mac OS X 10.11.6

Device Platform: Other

Date tested: 6 years ago

Test name	Executions per second
jQuery 2.1.4	1248760.0 Ops/sec
Vanilla JS	1918990.1 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.js'></script>
<div id="testElement"></div>

Tests:

jQuery 2.1.4
var el = $("#testElement")[0]; var className = el.className;
Vanilla JS
var el = document.querySelector('#testElement'); var className = el.className;