Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36 OPR/56.0.3051.43

Browser: Opera 56

Operating system: Mac OS X 10.14.0

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
getElementById	2706715.0 Ops/sec
querySelector	1529123.0 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;