Measuring performance of GHC

[Johannes Waldmann]

Hi,

> ... to compile it with a profiled GHC and look at the report?

How hard is it to build hackage or stackage
with a profiled ghc? (Does it require ghc magic, or can I do it?)

> ... some obvious sub-optimal algorithms in GHC.

obvious to whom? you mean sub-optimality is already known,
or that it would become obvious once the reports are there?

Even without profiling - does hackage
collect timing information from its automated builds?

What needs to be done to add timing information in places like
https://hackage.haskell.org/package/obdd-0.6.1/reports/1 ?

- J.W.