#9630: compile-time performance regression (probably due to Generics) -------------------------------------+------------------------------------- Reporter: hvr | Owner: dfeuer Type: bug | Status: new Priority: high | Milestone: 8.2.1 Component: Compiler | Version: 7.9 Resolution: | Keywords: deriving- | perf, Generics Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #9583, #10293, | Differential Rev(s): #13059, #10818 | Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj):
Are we hoping to be able to reintroduce the inlines and merge the classes?
Well, the original Description says that compiling Cabal with GHC 8.0 was 26x slower than compiling with GHC 7.8. That's a big difference. How long does it take to compile (the same) Cabal with GHC 8.2? That's the question at hand. If it's still 26x slower (and your comment suggests that it is, albeit maybe not 26x), I'd love to dig a bit into why. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9630#comment:52 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler