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/605.1.15 (KHTML, like Gecko) Version/15.0 Safari/605.1.15

Browser: Safari 15

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
HTMLCanvasElement 2d drawImage HTMLImageElement	1117215.0 Ops/sec
HTMLCanvasElement 2d drawImage HTMLCanvasElement	1764648.0 Ops/sec
HTMLCanvasElement 2d drawImage OffscrenCanvas	1522202.0 Ops/sec
HTMLCanvasElement 2d drawImage ImageBitmap	1147570.0 Ops/sec
OffscreenCanvas 2d drawImage HTMLImageELement	1068024.0 Ops/sec
OffscreenCanvas 2d drawImage HTMLCanvasElement	1343595.0 Ops/sec
OffscreenCanvas 2d drawImage OffscreenCanvas	1699356.0 Ops/sec
OffscreenCanvas 2d drawImage ImageBitmap	1389469.0 Ops/sec
HTMLCanvasElement bitmaprenderer transferFromImageBitmap ImageBitmap	1205337.0 Ops/sec
OffscreenCanvas bitmaprenderer transferFromImageBitmap ImageBitmap	1254422.0 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()); })();

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

HTMLCanvasElement 2d drawImage HTMLImageElement

HTMLCanvasElement 2d drawImage HTMLCanvasElement

HTMLCanvasElement 2d drawImage OffscrenCanvas

HTMLCanvasElement 2d drawImage ImageBitmap

OffscreenCanvas 2d drawImage HTMLImageELement

OffscreenCanvas 2d drawImage HTMLCanvasElement

OffscreenCanvas 2d drawImage OffscreenCanvas

OffscreenCanvas 2d drawImage ImageBitmap

HTMLCanvasElement bitmaprenderer transferFromImageBitmap ImageBitmap

OffscreenCanvas bitmaprenderer transferFromImageBitmap ImageBitmap