#15176: Superclass `Monad m =>` makes program run 100 times slower -------------------------------------+------------------------------------- Reporter: danilo2 | Owner: osa1 Type: bug | Status: new Priority: highest | Milestone: ⊥ Component: Compiler | Version: 8.4.2 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: | -------------------------------------+------------------------------------- Changes (by osa1): * milestone: 8.8.1 => ⊥ Comment: Unfortunately we won't be able to get back to this for 8.8.1, and I don't know if this is doable in its current form so I'm removing the milestone. We should focus on finding a smaller reproducer as the current reproducer is taking forever to build and have dozens (if not hundreds) of dependencies (although the change we need to do is not in a dependency, it may still related with code generated for dependencies. In any case less dependencies is always better when debugging). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15176#comment:17 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler