Run results for: offsetWidth / offsetHeight vs. getBoundingClientRect()

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

offsetWidth / offsetHeight (destructured)

7.9M/s

offsetWidth / offsetHeight (destructured and renamed)

7.9M/s

offsetWidth / offsetHeight (simple property access)

6.0M/s

getBoundingClientRect() (destructured)

3.9M/s

getBoundingClientRect() (simple property access)

3.7M/s

View exact numbers

Test name	Executions per second
✓ offsetWidth / offsetHeight (destructured)	7,871,676 Ops/sec
offsetWidth / offsetHeight (destructured and renamed)	7,851,940 Ops/sec
offsetWidth / offsetHeight (simple property access)	6,007,892 Ops/sec
getBoundingClientRect() (destructured)	3,855,783 Ops/sec
getBoundingClientRect() (simple property access)	3,691,184 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:

offsetWidth / offsetHeight (destructured and renamed)
const { offsetWidth: width, offsetHeight: height } = el; const perim = (width + height) * 2;
offsetWidth / offsetHeight (destructured)
const { offsetWidth, offsetHeight } = el; const perim = (offsetWidth + offsetHeight) * 2;
offsetWidth / offsetHeight (simple property access)
const width = el.offsetWidth; const height = el.offsetHeight; const perim = (width + height) * 2;
getBoundingClientRect() (destructured)
const { width, height } = el.getBoundingClientRect(); const perim = (width + height) * 2;
getBoundingClientRect() (simple property access)
const rect = el.getBoundingClientRect(); const width = rect.width; const height = rect.height; const perim = (width + height) * 2;