Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (Android 12; Mobile; rv:102.0) Gecko/102.0 Firefox/102.0

Browser: Firefox Mobile 102

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
getElementById	3310578.0 Ops/sec
querySelector	2388303.0 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;