I get that, the Kangax table was just an example I literally ran into moments before.<p>But for a more &quot;pure&quot; js example, I have an app which does some image processing in the browser using the canvas ImageData stuff and typed arrays.<p>For whatever reason my test case completes in about 3 seconds in chrome, 3 to 4 seconds in FF, 11 seconds in IE11, and 6 seconds in Edge.<p>I&#x27;ve profiled the hell out of it and i just can&#x27;t figure out the reasoning for it, but it&#x27;s there. (and as a side note, having the dev tools open in Edge obliterates javascript performance, my test case was taking 30+ seconds to run when i had the dev tools open and it took me longer than i&#x27;d like to admit to figure that one out)<p>I have a feeling the problem is that i&#x27;m optimizing for V8 because i know it the best, and i&#x27;d much rather not do that if possible.