Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36 OPR/115.0.0.0

Browser: Opera 115

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

getElementById

16.6M/s

querySelector

3.6M/s

View exact numbers

Test name	Executions per second
✓ getElementById	16,614,488 Ops/sec
querySelector	3,641,440 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;