[pandaman]

I also don't see how you can possibly optimize GPU code based on some static CPU code but, on some game consoles, you can share data structures between GPU and CPU, which is nice. E.g. instead of binding a bunch of named parameters you just pass a pointer to a native C struct. This, apart from greatly simplifying the code is a performance advantage as well (the parameter binding is not free and consumes both CPU and GPU time). Though, I don't see how this could be possible to implement in a platform-independent way.