Run results for: jQuery vs getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/126.0.6478.153 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 126

Operating system: iOS 17.5

Device Platform: Mobile

Date tested: 4 months ago

Test name	Executions per second
jQuery	6530633.5 Ops/sec
getElementById	13009483.0 Ops/sec
querySelector	5691800.0 Ops/sec

HTML Preparation code:

<script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.1.0.min.js"></script>
<div id="testElement" class="test class list classes"></div>

Tests:

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

Run results for: jQuery vs getElementById vs querySelector

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

jQuery

getElementById

querySelector