Benchmark: window.getComputedStyle vs. getBoundingClientRect get width

HTML Preparation code:

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

Tests:

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

Rendered benchmark preparation results:

Previous results

Test case name	Result
getComputedStyle
getBoundingClientRect

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser/OS: Chrome 134 on Mac OS X 10.15.7

getBoundingClientRect

470/s

getComputedStyle

308/s

View exact numbers

Test name	Executions per second
✓ getBoundingClientRect	470 Ops/sec
getComputedStyle	308 Ops/sec

window.getComputedStyle vs. getBoundingClientRect get width (version: 1)