Run results for: querySelector vs. getElementById Performance

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36

Browser: Chrome 151

Operating system: Linux

Device Platform: Desktop

Date tested: 27 days ago

Benchmark engine: Benchmark.js

getElementById

34.3M/s

querySelector

21.3M/s

View exact numbers

Test name	Executions per second
✓ getElementById	34,277,676 Ops/sec
querySelector	21,259,536 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;