Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36 OPR/113.0.0.0

Browser: Opera 113

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

getElementById

4.2M/s

querySelector

2.2M/s

View exact numbers

Test name	Executions per second
✓ getElementById	4,246,451 Ops/sec
querySelector	2,241,787 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;