Run results for: jQuery by id vs Document.getElementById

Run details:

User agent: Mozilla/5.0 (Linux; Android 5.1.1; Lenovo A6020a40 Build/LMY47V) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.109 Mobile Safari/537.36

Browser: Chrome Mobile 65

Operating system: Android 5.1.1

Device Platform: Lenovo A6020a40

Date tested: 6 years ago

Test name	Executions per second
jQuery	106396.9 Ops/sec
Vanilla JS	274380.6 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