Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.157 Safari/537.36

Browser: Chrome 74

Operating system: Mac OS X 10.14.3

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
getElementById	5295156.0 Ops/sec
querySelector	2913499.0 Ops/sec

HTML Preparation code:

<div id="testElement"></div>

Tests:

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