Can onload event fire right after setting image src attribute?

What console log can开发者_运维百科 be after this code will be executed?

var img = new Image;
img.onload = function() { console.log('B'); };
img.src = 'image.jpg';
for (var i=0;i<100000;i++) {
  console.log('A');
}

I know, that most likely it will be A...AB. But can it be A...B...A or BA...A? For example, if image.jpg is very small file and connection is very fast.

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It can be any of them. You don't know how long it takes to load the image. The image could even be cached, minimizing the loading time.