Benchmark Run Result for: jQuery 3.3.1 selector vs document.querySelector

Test name	Executions per second
jQuery 3.3.1	759197.6 Ops/sec
Vanilla JS	1139768.0 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;