Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 OPR/119.0.0.0

Browser: Opera 119

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

getElementById

29.9M/s

querySelector

7.1M/s

View exact numbers

Test name	Executions per second
✓ getElementById	29,869,974 Ops/sec
querySelector	7,149,332 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;