Run results for: getBoundingClientRect vs offset performance

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 131

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

getBoundingClientRect

877K/s

offset

444K/s

View exact numbers

Test name	Executions per second
✓ getBoundingClientRect	877,139 Ops/sec
offset	443,636 Ops/sec

HTML Preparation code:

<div id="test" style="position: absolute; left: 10%; top: 20%;">Test</div>

Tests:

getBoundingClientRect
const testDiv = document.getElementById('test'); const testRect = testDiv.getBoundingClientRect(); const x = testRect.left + testRect.width / 2;
offset
const testDiv = document.getElementById('test'); const y = testDiv.offsetLeft + testDiv.offsetWidth / 2;