Run results for: clientHeight vs offsetHeight vs window.getComputedStyle

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

offsetHeight

3.7M/s

clientHeight

3.3M/s

window.getComputedStyle

1.4M/s

Multiple: _style e clientHeight

889K/s

Multiple: Only _style

627K/s

View exact numbers

Test name	Executions per second
✓ offsetHeight	3,717,358 Ops/sec
clientHeight	3,254,357 Ops/sec
window.getComputedStyle	1,402,569 Ops/sec
Multiple: _style e clientHeight	888,765 Ops/sec
Multiple: Only _style	626,553 Ops/sec

HTML Preparation code:

<div id="teste">teste</div>

Script Preparation code:

var teste_n = '123px';
var _style = window.getComputedStyle(document.getElementById('teste'));

Tests:

clientHeight
document.getElementById('teste').clientHeight;
offsetHeight
document.getElementById('teste').offsetHeight;
window.getComputedStyle
parseFloat(_style['height'])
Multiple: Only _style
parseFloat(_style['margin-top']) parseFloat(_style['margin-bottom']) parseFloat(_style['height'])
Multiple: _style e clientHeight
parseFloat(_style['margin-top']) parseFloat(_style['margin-bottom']) document.getElementById('teste').clientHeight;