Run results for: TreeWalker vs querySelectorAll (* all elements)2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

TreeWalker

12.1M/s

querySelectorAll

2.7M/s

View exact numbers

Test name	Executions per second
✓ TreeWalker	12,114,138 Ops/sec
querySelectorAll	2,747,790 Ops/sec

HTML Preparation code:

<!-- article out start -->
<article>
  <!-- article in start -->
  <h1>Lorem ipsum</h1>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Cumque, nostrum.</p>
  <!-- article in end -->
</article>
<!-- article out end -->

<!-- article out start -->
<article>
  <!-- article in start -->
  <h1>Lorem ipsum</h1>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Cumque, nostrum.</p>
  <!-- article in end -->
</article>
<!-- article out end -->

<!-- article out start -->
<article>
  <!-- article in start -->
  <h1>Lorem ipsum</h1>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Cumque, nostrum.</p>
  <!-- article in end -->
</article>
<!-- article out end -->

Script Preparation code:

const treeWalker = document.createTreeWalker(
  document.body,
  NodeFilter.SHOW_ELEMENT
);

Tests:

TreeWalker
const list = []; let element; while (element = treeWalker.nextNode()) { list.push(element); }
querySelectorAll
const list = document.body.querySelectorAll('*');