Run results for: scrollHeight vs getBoundingClientRect().height

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:125.0) Gecko/20100101 Firefox/125.0

Browser: Firefox 125

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

scrollHeight

26.9M/s

getBoundingClientRect().height

7.8M/s

View exact numbers

Test name	Executions per second
✓ scrollHeight	26,934,368 Ops/sec
getBoundingClientRect().height	7,816,919 Ops/sec

HTML Preparation code:

<div id="el">
  <h2>Lorem ipsum dolor sit amet</h2>
</div>

Script Preparation code:

var el = document.getElementById("el");

Tests:

scrollHeight
const height = el.scrollHeight;
getBoundingClientRect().height
const height = el.getBoundingClientRect().height;