#1168: Optimisation sometimes decreases sharing in IO code -------------------------------------+------------------------------------- Reporter: simonmar | Owner: Type: bug | Status: new Priority: normal | Milestone: ⊥ Component: Compiler | Version: 6.6 Resolution: | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: | Blocked By: None/Unknown | Related Tickets: Test Case: | nofib/spectral/calendar | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by simonpj): David, it's be very helpful if you could * Specify the exact steps to reproduce the performance changes you see, with and without `-fno-state-hack`. * Say which version of GHC you are using Thanks Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/1168#comment:17 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler