Run results for: [compareDocumentPosition vs contains] performance

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:122.0) Gecko/20100101 Firefox/122.0

Browser: Firefox 122

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

contains

81K/s

compareDocumentPosition

62K/s

View exact numbers

Test name	Executions per second
✓ contains	81,047 Ops/sec
compareDocumentPosition	61,733 Ops/sec

HTML Preparation code:

<html>
  <head>
  </head>
  <body>
    <div id="div">
    	<div id="a">
   		</div>
    </div>
    <div id="b">
    </div>
  </body>
</html>

Tests:

compareDocumentPosition
const { div, a, b } = window for (let i = 0; i < 100; i++) { let compare = div.compareDocumentPosition(a) compare & 8 compare & 16 compare = div.compareDocumentPosition(b) compare & 8 compare & 16 }
contains
const { div, a, b } = window for (let i = 0; i < 100; i++) { div.contains(a) a.contains(div) div.contains(b) b.contains(div) }