Run results for: querySelector vs. getElementById Performance

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

getElementById

17.4M/s

querySelector

3.7M/s

View exact numbers

Test name	Executions per second
✓ getElementById	17,391,206 Ops/sec
querySelector	3,659,673 Ops/sec

HTML Preparation code:

<div id="el"></div>

Tests:

getElementById
var el = document.getElementById('el'); var className = el.className;
querySelector
var el = document.querySelector('#el'); var className = el.className;