Run results for: getElementsByTagName vs querySelectorAll

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:149.0) Gecko/20100101 Firefox/149.0

Browser: Firefox 149

Operating system: Linux

Device Platform: Desktop

Date tested: 4 months ago

Benchmark engine: Benchmark.js

getElementsByTagName

1365.5M/s

QueryselectorAll

2.8M/s

View exact numbers

Test name	Executions per second
✓ getElementsByTagName	1,365,535,104 Ops/sec
QueryselectorAll	2,751,643 Ops/sec

HTML Preparation code:

<ul id="list">
  <li>Item 1</li>
  <li>Item 2</li>
  <li>Item 3</li>
  <li>Item 4</li>
</ul>

Script Preparation code:

const list = document.getElementById('list')

Tests: