[GHC] #12367: Commit adding instances to GHC.Generics regression compiler performance

[GHC]

#12367: Commit adding instances to GHC.Generics regression compiler performance
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           Reporter:  bgamari        |             Owner:  bgamari
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.0.2
          Component:  Compiler       |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Compile-time
  Unknown/Multiple                   |  performance bug
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Recently 673efccb3b348e9daf23d9e65460691bbea8586e added a number of new
 instances for types defined in `GHC.Generics`. Unfortunately, it seems
 that this has regressed nofib compilation allocations (and also, it seems,
 compile time) by about 10%.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12367>
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