[GHC] #3840: ghc-6.12.1 takes longer to compile code and produces bigger binaries compared to ghc-6.10.4

[GHC]

#3840: ghc-6.12.1 takes longer to compile code and produces bigger binaries
compared to ghc-6.10.4
-------------------------+--------------------------------------------------
    Reporter:  maeder    |        Owner:              
        Type:  bug       |       Status:  new         
    Priority:  normal    |    Milestone:              
   Component:  Compiler  |      Version:  6.12.1      
    Keywords:            |   Difficulty:              
          Os:  Linux     |     Testcase:              
Architecture:  x86       |      Failure:  None/Unknown
-------------------------+--------------------------------------------------

Comment(by maeder):

 I should mention that all instances in our ATC-files are "orphan".

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3840#comment:10>
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