Run results for: jQuery addClass vs jQuery classList.add vs querySelector classList.add

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0

Browser: Firefox 70

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
jQuery addClass	1026242.0 Ops/sec
jQuery classList.add	2045841.0 Ops/sec
querySelector classList.add	1714507.0 Ops/sec

HTML Preparation code:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div id="el"></div>

Script Preparation code:

document.getElementById("el").classList.remove("test");

Tests:

jQuery addClass
$("#el").addClass("test");
jQuery classList.add
$("#el")[0].classList.add("test");
querySelector classList.add
document.querySelector("#el").classList.add("test");