Run results for: getElementsByTagName vs querySelectorAll

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

Browser: Chrome 134

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

getElementsByTagName

37.3M/s

QueryselectorAll

7.0M/s

View exact numbers

Test name	Executions per second
✓ getElementsByTagName	37,344,560 Ops/sec
QueryselectorAll	7,001,733 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: