#5642: Deriving Generic of a big type takes a long time and lots of space -------------------------------------+------------------------------------- Reporter: basvandijk | Owner: bgamari Type: bug | Status: new Priority: normal | Milestone: 8.0.1 Component: Compiler | Version: 7.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: T5642 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): For the record this sounds quite similar to #8095 in that the compiler seems to be creating long strings of coercions (although here the simplifier doesn't even seem capable of eliminating them). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/5642#comment:24 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler