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/140.0.0.0 Safari/537.36

Browser: Chrome 140

Operating system: Windows

Device Platform: Desktop

Date tested: 10 months ago

getElementById

38.7M/s

querySelector

9.2M/s

View exact numbers

Test name	Executions per second
✓ getElementById	38,656,328 Ops/sec
querySelector	9,197,244 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;