
#14980: Runtime performance regression with binary operations on vectors -------------------------------------+------------------------------------- Reporter: ttylec | Owner: bgamari Type: bug | Status: new Priority: high | Milestone: 8.8.1 Component: Compiler | Version: 8.2.2 Resolution: | Keywords: vector | bitwise operations 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): If the badness is only for a particular stack LTS, I wonder if the badness will go away in the next stack LTS and we can declare this ticket moot? I'd suggest the next thing to investigate: do a profiled build and see where the factor of 100 is going. It's such a huge change it should be blindingly obvious :-). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14980#comment:13 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler