Run results for: offsetHeight vs getClientBoundingRect().height

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
offsetHeight	2115258.5 Ops/sec
getBoundingCientRect	1222938.4 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:

offsetHeight
const height = el.offsetHeight; const perim = height * 2;
getBoundingCientRect
const rect = el.getBoundingClientRect(); const height = rect.height; const perim = height * 2;