#7258: Compiling DynFlags is jolly slow -------------------------------------+------------------------------------- Reporter: simonpj | Owner: simonpj Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.1 Resolution: | Keywords: deriving-perf Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by tdammers): Interesting: https://ghc.haskell.org/trac/ghc/attachment/ticket/7258/ghc- large-record-types-cmm-per-core.png For the three offenders (read, show, read-appl), the C--/Core ratio goes *up* as the total code size grows, for the well-behaved examples it goes down. The latter is expected (constant overhead + linear code size), the former hints at some sort of nonlinearity. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7258#comment:68 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler