Run results for: getElementByClassName vs querySelector 1

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.1 Safari/605.1.15

Browser: Safari 13

Operating system: Mac OS X 10.15.5

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
getElementById	3617220.2 Ops/sec
querySelector	3020285.8 Ops/sec

HTML Preparation code:

<div class="testElement"></div>

Tests:

getElementById
var el = document.getElementsByClassName('testElement'); var className = el.className;
querySelector
var el = document.querySelector('.testElement'); var className = el.className;