Run results for: Get precise height : getComputedStyle vs getBoundingClientRect vs innerHeight - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Windows

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
getComputedStyle	60.7 Ops/sec
getBoundingClientRect	108.7 Ops/sec
clientHeight	168.4 Ops/sec

HTML Preparation code:

<div id="foo"></div>

AخA
 
<div id="foo"></div>

Tests:

getComputedStyle
var i = 5000; while (i--) { checkDisplay('foo'); } function checkDisplay(id) { return window.getComputedStyle(document.getElementById(id), null).getPropertyValue("height").slice(0, -2); }
x

var i = 5000;
while (i--) {
checkDisplay('foo');
}

function checkDisplay(id) {
return window.getComputedStyle(document.getElementById(id), null).getPropertyValue("height").slice(0, -2);
}
getBoundingClientRect
var i = 5000; while (i--) { checkDisplay('foo'); } function checkDisplay(id) { return document.getElementById(id).getBoundingClientRect().height; }
var i = 5000;
while (i--) {
checkDisplay('foo');
}

function checkDisplay(id) {
return document.getElementById(id).getBoundingClientRect().height;
}

clientHeight

var i = 5000;
while (i--) {
	checkDisplay('foo');
}

function checkDisplay(id) {
    return document.getElementById(id).clientHeight;
}

 
var i = 5000;while (i--) {    checkDisplay('foo');}​function checkDisplay(id) {    return document.getElementById(id).clientHeight;}