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Run results for: Get precise height : getComputedStyle vs getBoundingClientRect vs innerHeight

Go to the benchmark
Run details:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Mobile Safari/537.36 EdgA/134.0.0.0
Chrome Mobile 134
Android
Mobile
10 days ago
Test name Executions per second
getComputedStyle 20.5 Ops/sec
getBoundingClientRect 59.4 Ops/sec
clientHeight 102.9 Ops/sec
HTML Preparation code:
AخA
 
1
<div id="foo"></div>
Tests:

  • getComputedStyle

    ​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;
    }
    ​

  • clientHeight

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