Run results for: drawImage() img vs canvas vs bitmap + cropping

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

img

21.9M/s

canvas

21.8M/s

bitmap

21.8M/s

View exact numbers

Test name	Executions per second
✓ img	21,907,472 Ops/sec
canvas	21,842,964 Ops/sec
bitmap	21,773,308 Ops/sec

Script Preparation code:

var canvas = document.createElement('canvas')
var context = canvas.getContext('2d')
var bitmap
var img = new Image()
img.onload = async () => {
    canvas.width = img.width
    canvas.height = img.height
    context.drawImage(img, 0, 0)
    bitmap = await createImageBitmap(img)
}
img.src = 'https://neurostof.nl/ns/letters.jpg'

var c = document.createElement('canvas').getContext('2d')


// bitmap && c.drawImage(img,    250, 250, 250, 250, 0, 0, 1000, 1000)
// bitmap && c.drawImage(canvas, 250, 250, 250, 250, 0, 0, 1000, 1000)
// bitmap && c.drawImage(bitmap, 250, 250, 250, 250, 0, 0, 1000, 1000)

Tests:

img
bitmap && c.drawImage(img, 250, 250, 250, 250, 0, 0, 1000, 1000)
canvas
bitmap && c.drawImage(canvas, 250, 250, 250, 250, 0, 0, 1000, 1000)
bitmap
bitmap && c.drawImage(bitmap, 250, 250, 250, 250, 0, 0, 1000, 1000)