[GHC] #5642: Deriving Generic of a big type takes a long time and lots of space

[GHC]

#5642: Deriving Generic of a big type takes a long time and lots of space
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        Reporter:  basvandijk        |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.3
      Resolution:                    |             Keywords:  deriving-
                                     |  perf, Generics
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:  T5642
      Blocked By:                    |             Blocking:
 Related Tickets:  #13059            |  Differential Rev(s):  Phab:D2304
       Wiki Page:                    |
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Comment (by NeilMitchell):

 See also https://github.com/haskell/cabal/issues/5893 which hits the same
 issue and makes GHC itself compile slowly.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5642#comment:52>
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