Benchmark Run Result for: Image vs ImageBitmap with context2d

Image vs ImageBitmap with context2d

Testing draw calls using a raw Image versus an ImageBitmap

Date tested: 10 months ago

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1.2 Safari/605.1.15

Test name	Executions per second
Image	3936320.0 Ops/sec
ImageBitmap	558988.7 Ops/sec

Benchmark definition (click to collapse):

Script Preparation code:

var img = new Image();
var imageBitmap;
var doneLoading = false;
let canvas = document.createElement('canvas');
canvas.width = 640;
canvas.height = 480;
let canvas2 = document.createElement('canvas');
canvas2.width = 640;
canvas2.height = 480;

var ctx = canvas.getContext('2d');
var ctx2 = canvas2.getContext('2d');

img.addEventListener('load', function() {
  Promise.all([
    createImageBitmap(img)
  ]).then(function(images) {
  imageBitmap = images[0];
  doneLoading = true;
}, false);
});

img.src = 'https://1.bp.blogspot.com/-52MtzD0GfX0/WvP52CL1WjI/AAAAAAAAOVw/_OpK4JHeWK01d-7IiZ6vzojYGhXqLRXrACLcBGAs/s1600/EMxediL.jpg';

Tests:

Image
if (doneLoading) ctx.drawImage(img,0,0);
ImageBitmap
if (doneLoading) ctx2.drawImage(imageBitmap,0,0);

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