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/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

offsetHeight

4.3M/s

clientHeight

4.2M/s

window.getComputedStyle

2.0M/s

Multiple: _style e clientHeight

1.1M/s

Multiple: Only _style

878K/s

View exact numbers

Test name	Executions per second
✓ offsetHeight	4,298,922 Ops/sec
clientHeight	4,227,661 Ops/sec
window.getComputedStyle	1,991,010 Ops/sec
Multiple: _style e clientHeight	1,147,004 Ops/sec
Multiple: Only _style	878,290 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;