#12990: Partially applied constructors with unpacked fields simplified badly -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): In `MkId` line 511 we have {{{ wrap_unf = mkInlineUnfolding (Just wrap_arity) wrap_rhs }}} The `Just wrap_arity` is what prevents GHC inlining the wrapper until it is saturated. Change it to `Nothing` to allow a partially-applied wrapper to inline. Worth a try. I doubt it'd have any bad effects. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12990#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler