Run results for: clientHeight vs offsetHeight vs getBoundingClientRect

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0

Browser: Firefox 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

clientWidth / clientHeight

9.3M/s

offsetWidth / offsetHeight

6.1M/s

getBoundingClientRect

3.2M/s

View exact numbers

HTML Preparation code:

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

Script Preparation code:

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

Tests:

clientWidth / clientHeight
const { clientWidth, clientHeight } = el; const perim = (clientWidth + clientHeight) * 2;
offsetWidth / offsetHeight
const { offsetWidth, offsetHeight } = el; const perim = (offsetWidth + offsetHeight) * 2;
getBoundingClientRect
const { width, height } = el.getBoundingClientRect(); const perim = (width + height) * 2;