#16004: Vector performance regression in GHC 8.6 -------------------------------------+------------------------------------- Reporter: guibou | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.3 Component: Compiler | Version: 8.6.2 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): Yes, that's great. I think we know why this is happening too. Can someone try the patch in #7206, specifically `wip/cheap-build-osa1`, and see if it nails this case? And perhaps do a new nofib run. The conclusion on #7206 was that we should probably accept the patch -- and if it cures this vector problem that'd be a strong positive reason to do so. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16004#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler