#14001: Inlining does not work between modules -------------------------------------+------------------------------------- Reporter: danilo2 | Owner: (none) Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 8.0.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by mpickering): Here is a smaller reproduction. I don't think a lot of the type family stuff is necessary for the reproduction. https://github.com/mpickering/musical-spork You can build it with `cabal new-build`. I noticed that the `Strict` language extension was enabled and so the definitions were not in fact equivalent. This makes the performance difference less surprising. If you modify the definition of `(.)` in `A.hs` to remove the bang then the program gets a lot slower. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14001#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler