Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (Linux; Android 13; SAMSUNG SM-S908N) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/22.0 Chrome/111.0.5563.116 Mobile Safari/537.36

Browser: Chrome Mobile 111

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
getElementById	2457958.8 Ops/sec
querySelector	1519941.9 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;