#9233: Compiler performance regression ---------------------------------+------------------------------------ Reporter: augustss | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler | Version: 7.8.2 Resolution: | Keywords: Operating System: Windows | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: ---------------------------------+------------------------------------ Comment (by simonpj): I guess that Austin might be able to put up a Windows version of GHC 7.8 ( plus I suppose 7.6) that has profiling enabled. You would not want to run that regularly, but it would mean you could compile both modules with a compiler that dumps its profile. Are you using -O2? The `SpecConstr` thing can make a pretty big difference. You could try switching it off globally and see what happens. Using `-dshow-passes` shows you the size of each intermediate can also be illuminating, because it shows size blow-ups clearly. Probably worth a try before the profiled-compiler stuff. Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9233#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler