Run results for: getElementById vs querySelector (class vs id)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:139.0) Gecko/20100101 Firefox/139.0

Browser: Firefox 139

Operating system: Linux

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
getElementById	4748257.0 Ops/sec
querySelector	3526863.5 Ops/sec

HTML Preparation code:

<div id="t" class="t"></div>

Tests:

getElementById
var el = document.getElementById('t'); var className = el.className;
querySelector
var el = document.querySelector('.t'); var className = el.className;