Two things that come out of this.
The first is the power of meta-programming languages like Haxe. Using a better programming language and a typeless goop as your target machine-language can deliver great performance. Not entirely surprising – of course – because hardware is un-typed 🙂
We actually used Haxe at Zynga to write a renderer if memory serves me write and got better performance than we could have if we had written it in entirely in Flash.