Run results for: Canvas context2d: Image vs ImageBitmap vs Canvas (with clear canvas)

Test name	Executions per second
✓ Image	959,460 Ops/sec
Canvas	898,584 Ops/sec
ImageBitmap	836,180 Ops/sec

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', { alpha: false });
var ctxImageBitmap = canvasImageBitmap.getContext('2d', { alpha: false });
var ctx = canvas.getContext('2d', {	alpha: false });
var ctxCanvas = canvasCanvas.getContext('2d', {	alpha: false });

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';
  });
}