Run results for: jQuery 3.3.1 selector vs document.querySelector

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.84 Safari/537.36

Browser: Chrome 68

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
jQuery 3.3.1	595036.8 Ops/sec
Vanilla JS	918279.6 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>
<div id="testElement"></div>

Tests:

jQuery 3.3.1
var el = $("#testElement")[0]; var className = el.className;
Vanilla JS
var el = document.querySelector('#testElement'); var className = el.className;