#13153: Several Traversable instances have an extra fmap -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: dfeuer Type: bug | Status: new Priority: normal | Milestone: 8.4.1 Component: Core Libraries | Version: 8.1 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 RyanGlScott): Forgive my ignorance here, but how are you proposing to inline the inner `traverse`? In my mind, the only way I can see how you'd remove the `(<$>)` is if you had a special case for `ZipList []`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13153#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler