Run results for: querySelector vs. getElementById Performance

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36

Browser: Chrome 149

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 27 days ago

getElementById

35.1M/s

querySelector

8.5M/s

View exact numbers

Test name	Executions per second
✓ getElementById	35,096,184 Ops/sec
querySelector	8,546,090 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;