Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.105 Safari/537.36 Vivaldi/2.4.1488.38

Browser: Chrome 73

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
getElementById	3158520.8 Ops/sec
querySelector	1871520.6 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;