Re: [Haskell-cafe] Performance Help

Hi

I notice that there's not much user-accessible documentation of what you can expect GHC (or some other Haskell implementation) to do and not do with a given piece of code.

Yhc/nhc/Hugs - nothing GHC - inlining, simplification, fusion if you use the build in functions in a specified way, strictness analysis, maybe some unboxing, let movement, some other tricks JHC - everything The problem is that things like strictness are a static analysis which is undecidable in general. Static analysis is probably too complex for the user to figure out what is going on, its much better to look at the Core generated and see what actually happened. Thanks Neil