Run results for: clientHeight vs offsetHeight vs window.getComputedStyle

Run details:

User agent: Mozilla/5.0 (Linux; Android 7.1.1; SM-J510FN) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.93 Mobile Safari/537.36

Browser: Chrome Mobile 79

Operating system: Android 7.1.1

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
clientHeight	58099.4 Ops/sec
offsetHeight	33646.3 Ops/sec
window.getComputedStyle	25272.2 Ops/sec
Multiple: Only _style	13370.0 Ops/sec
Multiple: _style e clientHeight	17667.5 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;