Run results for: HTMLCanvasElement and OffscreenCanvas drawImage performance for HTMLImageElement, HTMLCanvasElement, OffscreenCanvas and ImageBitmap

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

OffscreenCanvas 2d drawImage HTMLImageELement

3.9M/s

HTMLCanvasElement 2d drawImage ImageBitmap

3.9M/s

HTMLCanvasElement 2d drawImage HTMLCanvasElement

3.9M/s

OffscreenCanvas 2d drawImage OffscreenCanvas

3.9M/s

OffscreenCanvas 2d drawImage HTMLCanvasElement

3.8M/s

HTMLCanvasElement 2d drawImage OffscrenCanvas

3.7M/s

OffscreenCanvas 2d drawImage ImageBitmap

3.5M/s

HTMLCanvasElement 2d drawImage HTMLImageElement

2.5M/s

HTMLCanvasElement bitmaprenderer transferFromImageBitmap ImageBitmap

787K/s

OffscreenCanvas bitmaprenderer transferFromImageBitmap ImageBitmap

99K/s

View exact numbers

Test name	Executions per second
✓ OffscreenCanvas 2d drawImage HTMLImageELement	3,949,468 Ops/sec
HTMLCanvasElement 2d drawImage ImageBitmap	3,891,301 Ops/sec
HTMLCanvasElement 2d drawImage HTMLCanvasElement	3,871,318 Ops/sec
OffscreenCanvas 2d drawImage OffscreenCanvas	3,867,609 Ops/sec
OffscreenCanvas 2d drawImage HTMLCanvasElement	3,789,899 Ops/sec
HTMLCanvasElement 2d drawImage OffscrenCanvas	3,731,187 Ops/sec
OffscreenCanvas 2d drawImage ImageBitmap	3,464,550 Ops/sec
HTMLCanvasElement 2d drawImage HTMLImageElement	2,529,892 Ops/sec
HTMLCanvasElement bitmaprenderer transferFromImageBitmap ImageBitmap	787,412 Ops/sec
OffscreenCanvas bitmaprenderer transferFromImageBitmap ImageBitmap	98,624 Ops/sec

Script Preparation code:

const image = document.createElement('img');
const loading = new Promise(resolve => {
    image.src = 'https://1.bp.blogspot.com/-52MtzD0GfX0/WvP52CL1WjI/AAAAAAAAOVw/_OpK4JHeWK01d-7IiZ6vzojYGhXqLRXrACLcBGAs/s1600/EMxediL.jpg';
    image.addEventListener('load', () => resolve(image));
});
(async function setup () {
  	await loading;
    const width = image.naturalWidth;
    const height = image.naturalHeight;

    canvas = document.createElement('canvas');
    canvas.width = width;
    canvas.height = height;
    canvas.getContext('2d').drawImage(image, 0, 0);

    offscreen = new OffscreenCanvas(width, height);
    offscreen.getContext('2d').drawImage(image, 0, 0);

    bitmap = offscreen.transferToImageBitmap();

    const c1 = document.createElement('canvas');
    c1.width = width;
    c1.height = height;
    ctx1 = c1.getContext('2d');

    const c2 = new OffscreenCanvas(width, height);
    ctx2 = c2.getContext('2d');
  
  	const c3 = document.createElement('canvas');
    c3.width = width;
    c3.height = height;
    ctx3 = c3.getContext('bitmaprenderer');
  
  	const c4 = new OffscreenCanvas(width, height);
    ctx4 = c4.getContext('bitmaprenderer');
})();
async function getTestObjects() {
  	await loading;
  	return {
      image,
      canvas,
      offscreen,
      bitmap,
      ctx1,
      ctx2,
      ctx3,
      ctx4,
    }
}

Tests:

HTMLCanvasElement 2d drawImage HTMLImageElement
(async function draw() { const {ctx1, image} = await getTestObjects(); ctx1.drawImage(image, 0, 0); })();
HTMLCanvasElement 2d drawImage HTMLCanvasElement
(async function draw() { const {ctx1, canvas} = await getTestObjects(); ctx1.drawImage(canvas, 0, 0); })();
HTMLCanvasElement 2d drawImage OffscrenCanvas
(async function draw() { const {ctx1, offscreen} = await getTestObjects(); ctx1.drawImage(offscreen, 0, 0); })();
HTMLCanvasElement 2d drawImage ImageBitmap
(async function draw() { const {ctx1, bitmap} = await getTestObjects(); ctx1.drawImage(bitmap, 0, 0); })();
OffscreenCanvas 2d drawImage HTMLImageELement
(async function draw() { const {ctx2, image} = await getTestObjects(); ctx2.drawImage(image, 0, 0); })();
OffscreenCanvas 2d drawImage HTMLCanvasElement
(async function draw() { const {ctx2, canvas} = await getTestObjects(); ctx2.drawImage(canvas, 0, 0); })();
OffscreenCanvas 2d drawImage OffscreenCanvas
(async function draw() { const {ctx2, offscreen} = await getTestObjects(); ctx2.drawImage(offscreen, 0, 0); })();
OffscreenCanvas 2d drawImage ImageBitmap
(async function draw() { const {ctx2, bitmap} = await getTestObjects(); ctx2.drawImage(bitmap, 0, 0); })();
HTMLCanvasElement bitmaprenderer transferFromImageBitmap ImageBitmap
(async function draw() { const {ctx3, offscreen} = await getTestObjects(); ctx3.transferFromImageBitmap(offscreen.transferToImageBitmap()); })();
OffscreenCanvas bitmaprenderer transferFromImageBitmap ImageBitmap
(async function draw() { const {ctx4, offscreen} = await getTestObjects(); ctx4.transferFromImageBitmap(offscreen.transferToImageBitmap()); })();