[GHC] #6166: Performance regression in mwc-random since 7.0.x

[GHC]

#6166: Performance regression in mwc-random since 7.0.x
-------------------------------+--------------------------------------------
    Reporter:  bos             |       Owner:                         
        Type:  bug             |      Status:  new                    
    Priority:  high            |   Milestone:  7.6.1                  
   Component:  Compiler        |     Version:  7.4.2                  
    Keywords:                  |          Os:  Unknown/Multiple       
Architecture:  x86_64 (amd64)  |     Failure:  Runtime performance bug
  Difficulty:  Unknown         |    Testcase:                         
   Blockedby:                  |    Blocking:                         
     Related:                  |  
-------------------------------+--------------------------------------------
Changes (by simonmar):

  * priority:  normal => high
  * difficulty:  => Unknown
  * milestone:  => 7.6.1


Comment:

 We should look into this: `-fno-state-hack` should never make something
 ''faster''; the whole point of the state hack is to improve performance.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6166#comment:1>
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