Run results for: jQuery by id vs Document.getElementById

Run details:

User agent: Mozilla/5.0 (Linux; Android 6.0.1; ASUS_Z00UD Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.84 Mobile Safari/537.36

Browser: Chrome Mobile 62

Operating system: Android 6.0.1

Device Platform: ASUS_Z00UD

Date tested: 6 years ago

Test name	Executions per second
jQuery	117881.0 Ops/sec
Vanilla JS	345659.9 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