[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 Revisions:
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Changes (by nomeata):

 * related:  #8731 => #8731 #10858


Comment:

 See #10858 for some ideas around the specific case of the `Ord` instance.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9557#comment:18>
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