Run results for: clientHeight vs offsetHeight vs window.getComputedStyle

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

offsetHeight

1.0M/s

clientHeight

965K/s

window.getComputedStyle

540K/s

Multiple: _style e clientHeight

376K/s

Multiple: Only _style

293K/s

View exact numbers

Test name	Executions per second
✓ offsetHeight	1,040,373 Ops/sec
clientHeight	964,627 Ops/sec
window.getComputedStyle	539,964 Ops/sec
Multiple: _style e clientHeight	376,170 Ops/sec
Multiple: Only _style	292,928 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;