I remember google's dart that compiled to javascript which ran 7% as fast as hand-written javascript. I wonder what the performance for this will be compared to handwritten lua? I've tried wrapping everything into tables like this in lua, and there definitely is a performance penalty.

I guess programmers will always be programmers. "Ooo look, this year CPU speed has quadtripled! Let's make a compiler for X to Y which will reduce performance by only 75%; It means you can run it at the same speed as running hand-written Y last year!"

I'll cringe when I see someone creating a WoW addon using this.