Benchmark Run Result for: jQuery 2.1.4 selector vs document.querySelector

Test name	Executions per second
jQuery 2.1.4	1546944.5 Ops/sec
Vanilla JS	2209757.0 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;