[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:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:  #8731             |                Blocking:
                                     |  Differential Revisions:
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Changes (by edsko):

 * cc: edsko (added)


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9557#comment:14>
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