Run results for: jQuery vs getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/94.0.4606.76 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 94

Operating system: iOS 15.0

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
jQuery	3549580.0 Ops/sec
getElementById	7274170.5 Ops/sec
querySelector	4651534.0 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