Run results for: clientWidth vs offsetWidth vs window.getComputedStyle

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36 OPR/69.0.3686.77

Browser: Opera 69

Operating system: Mac OS X 10.15.5

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
clientWidth	1255899.9 Ops/sec
offsetwidth	4201739.5 Ops/sec
window.getComputedStyle	657238.9 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:

clientWidth
document.getElementById('teste').clientWidth;
offsetwidth
document.getElementById('teste').offsetwidth;
window.getComputedStyle
parseFloat(_style['width'])

Run results for: clientWidth vs offsetWidth vs window.getComputedStyle

clientWidth

offsetwidth

window.getComputedStyle