#11701: ghc generates significant slower code -------------------------------------+------------------------------------- Reporter: HuStmpHrrr | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: efficiency Operating System: Linux | Architecture: x86_64 Type of failure: Runtime | (amd64) performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): Ahh, the problem appears to be that `GHC.Real.even` and `odd` are not marked as `INLINE` but rather are merely specialized to `Integer` and `Int`, whereas you use it at `Word32`. We should specialize these to these other types but it seems to me like they are cheap enough operations to be worth inlining. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11701#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler