Run results for: jquerySelector vs getElementByClassName

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.2 Safari/605.1.15

Browser: Safari 12

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
jquerySelector	1745488.4 Ops/sec
getElementByClassName	4508210.0 Ops/sec

HTML Preparation code:

<div class="testElement"></div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Tests:

jquerySelector
var el = $('.testElement'); var className = el.className;
getElementByClassName
var el = document.getElementsByClassName('testElement'); var className = el.className;