Run results for: querySelector vs. getElementById Performance

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.6.2 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 6 days ago

Benchmark engine: Benchmark.js

getElementById

87.8M/s

querySelector

15.1M/s

View exact numbers

Test name	Executions per second
✓ getElementById	87,824,600 Ops/sec
querySelector	15,145,370 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;