#13001: EnumFromThenTo is is not a good producer -------------------------------------+------------------------------------- Reporter: George | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: MacOS X | Architecture: x86_64 Type of failure: Runtime | (amd64) performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): I think perhaps you mean that in the call {{{ I# x `c` go_up (x +# delta) }}} since GHC doesn't know `c` is strict, it'll allocate a thunk for the second argument. Quite true. And that does mean it'd be good to inline `efdtIntUpFB`, I agree. But still, fewer Int boxes is better regardless. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13001#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler