Benchmark: Canvas context2d: Image vs ImageBitmap vs Canvas (with clear canvas and alpha true)

Script Preparation code:

var img = new Image();
var imageBitmap;
var doneLoading = false;
var canvasImage = document.createElement('canvas');
canvasImage.width = 700;
canvasImage.height = 700;
var canvasImageBitmap = document.createElement('canvas');
canvasImageBitmap.width = 700;
canvasImageBitmap.height = 700;
var canvas = document.createElement('canvas');
canvas.width = 700;
canvas.height = 700;
var canvasCanvas = document.createElement('canvas');
canvasCanvas.width = 700;
canvasCanvas.height = 700;

var ctxImage = canvasImage.getContext('2d');
var ctxImageBitmap = canvasImageBitmap.getContext('2d');
var ctx = canvas.getContext('2d');
var ctxCanvas = canvasCanvas.getContext('2d');

async function globalMeasureThatScriptPrepareFunction() {
  return new Promise((resolve, reject) => {
    img.addEventListener('load', function() {
        createImageBitmap(img)
      .then(function(bitmap) {
        imageBitmap = bitmap;
        debugger;
        doneLoading = true;
        console.log("bitmap preparation done");
        resolve(true);
      }, false);
      
      ctx.drawImage(img, 0, 0);
      console.log("canvas preparation done");
    });

    img.src = 'https://1.bp.blogspot.com/-52MtzD0GfX0/WvP52CL1WjI/AAAAAAAAOVw/_OpK4JHeWK01d-7IiZ6vzojYGhXqLRXrACLcBGAs/s1600/EMxediL.jpg';
  });
}

Tests:

Image
ctxImage.drawImage(img,0,0); ctxImage.clearRect(0,0,700,700);
ImageBitmap
ctxImageBitmap.drawImage(imageBitmap,0,0); ctxImageBitmap.clearRect(0,0,700,700);
Canvas
ctxCanvas.drawImage(canvas,0,0); ctxCanvas.clearRect(0,0,700,700);

Historical Performance Data aggregated from 10 community runs

Desktop Results:

Chrome 10 runs

Canvas

1.1M/s

Image

1.0M/s

ImageBitmap

975K/s

Fastest: Canvas (1.2x faster)

View exact numbers

✓ Canvas: 1,147,904 ops/sec
• Image: 1,042,685 ops/sec
• ImageBitmap: 975,405 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Image
ImageBitmap
Canvas

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36 Edg/140.0.0.0

Browser/OS: Chrome 140 on Windows

View result in a separate tab

Canvas

798K/s

Image

727K/s

ImageBitmap

691K/s

View exact numbers

Test name	Executions per second
✓ Canvas	798,060 Ops/sec
Image	726,544 Ops/sec
ImageBitmap	691,148 Ops/sec

Canvas context2d: Image vs ImageBitmap vs Canvas (with clear canvas and alpha true) (version: 1)

Comparing performance of: `Image vs ImageBitmap vs Canvas`

Created: one year ago by: Guest

Go to the latest result

Image

ImageBitmap

Canvas

Historical Performance Data aggregated from 10 community runs

Desktop Results:

Chrome 10 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Canvas context2d: Image vs ImageBitmap vs Canvas (with clear canvas and alpha true) (version: 1)

Comparing performance of: Image vs ImageBitmap vs Canvas

Created: one year ago by: Guest

Go to the latest result

Image

ImageBitmap

Canvas

Historical Performance Data aggregated from 10 community runs

Desktop Results:

Chrome 10 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `Image vs ImageBitmap vs Canvas`