Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser: Chrome 145

Operating system: Linux

Device Platform: Desktop

Date tested: 5 months ago

getElementById

14.8M/s

querySelector

3.2M/s

View exact numbers

Test name	Executions per second
✓ getElementById	14,801,708 Ops/sec
querySelector	3,235,518 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;