Run results for: [compareDocumentPosition vs querySelector] performance

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

compareDocumentPosition

130K/s

contains

40K/s

View exact numbers

Test name	Executions per second
✓ compareDocumentPosition	130,076 Ops/sec
contains	40,031 Ops/sec

HTML Preparation code:

<html>
  <head>
  </head>
  <body>
    <div id="div" data-attr>
    	<div id="a" data-attr>
   		</div>
    </div>
    <div id="b" data-attr>
    </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++) { const order = document.querySelectorAll('[data-attr]') }