Run results for: Measure Single Text

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.0 EdgiOS/46.3.26 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 15

Operating system: iOS 15.0

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
offsetWidth	4903051.5 Ops/sec
getBoundingClientRect	2210204.5 Ops/sec
canvas	497853.2 Ops/sec

HTML Preparation code:

<div>Hello World</div>

Script Preparation code:

const canvas = document.createElement('canvas')
window.context = canvas.getContext('2d')

Tests:

offsetWidth
document.querySelector('div').offsetWidth
getBoundingClientRect
document.querySelector('div').getBoundingClientRect().width
canvas
window.context.measureText('Hello world')

Run results for: Measure Single Text

Using various methods to measure a single string of text.

offsetWidth

getBoundingClientRect

canvas