[GHC] #9557: Deriving instances is slow

[GHC]

#9557: Deriving instances is slow
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        Reporter:  Feuerbach         |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.8.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8731 #10858      |  Differential Rev(s):
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Changes (by hvr):

 * cc: hvr (added)


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9557#comment:20>
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