Run results for: scrollHeight vs getBoundingClientRect().height

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

scrollHeight

10.2M/s

getBoundingClientRect().height

5.7M/s

View exact numbers

Test name	Executions per second
✓ scrollHeight	10,243,432 Ops/sec
getBoundingClientRect().height	5,721,914 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;