[Haskell-cafe] Time performance with inlining and space performance with newtype?

[Albert Y. C. Lai]

On 2015-10-09 07:30 AM, Rob Stewart wrote:
> Can I ask GHC to tell me how many bytes the storage of each object
> would require? Or more generally, would looking at GHC Core for all my
> data structures inform me of the memory space costs for each of them?

Cmm (-ddump-opt-cmm) is where you see the actual numbers directly.

But if you already know the stuff in

https://github.com/takenobu-hs/haskell-ghc-illustrated

then you can just look at the Haskell level and predict.