Run results for: jQuery by id vs Document.getElementById

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; CLT-L29 Build/HUAWEICLT-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Mobile Safari/537.36 [LinkedInApp]

Browser: Chrome Mobile 83

Operating system: Android

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
jQuery	577152.8 Ops/sec
Vanilla JS	1577675.8 Ops/sec

HTML Preparation code:

<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.1.0.min.js"></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 by id vs Document.getElementById

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

jQuery

Vanilla JS