[GHC] #6110: Data.Vector.Unboxed performance regression of 7.4.1 relative to 7.0.4

[GHC]

#6110: Data.Vector.Unboxed performance regression of 7.4.1 relative to 7.0.4
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    Reporter:  mdgabriel                      |       Owner:  pcapriotti             
        Type:  bug                            |      Status:  infoneeded             
    Priority:  high                           |   Milestone:  7.4.3                  
   Component:  Compiler                       |     Version:  7.4.1                  
    Keywords:  Vector Performance Regression  |          Os:  Linux                  
Architecture:  x86                            |     Failure:  Runtime performance bug
  Difficulty:  Unknown                        |    Testcase:                         
   Blockedby:                                 |    Blocking:                         
     Related:  #6111                          |  
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Comment(by pcapriotti):

 @mdgabriel: How did you build GHC 7.4.1 and 7.0.4? What does your
 `build.mk` look like?

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6110#comment:8>
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