Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Falkon/23.08.2 QtWebEngine/5.15.15 Chrome/87.0.4280.144 Safari/537.36

Browser: Chrome 87

Operating system: Linux

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
getElementById	2862459.0 Ops/sec
querySelector	1563556.0 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;