Run results for: jQuery 3.3.1 slim by id vs Document.getElementById

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.183 Safari/537.36 Vivaldi/1.96.1147.42

Browser: Chrome 65

Operating system: Windows

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
jQuery	724880.8 Ops/sec
Vanilla JS	1721633.2 Ops/sec

HTML Preparation code:

<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha256-3edrmyuQ0w65f8gfBsqowzjJe2iM6n0nKciPUp8y+7E=" crossorigin="anonymous"></script>
<div id="testElement"></div>

Tests:

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

Run results for: jQuery 3.3.1 slim by id vs Document.getElementById

Comparing speed of getting element by id with jQuery vs Vanilla JS

jQuery

Vanilla JS