[GHC] #4065: Inconsistent loop performance

[GHC]

#4065: Inconsistent loop performance
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    Reporter:  rl                |        Owner:                         
        Type:  bug               |       Status:  new                    
    Priority:  normal            |    Milestone:  7.2.1                  
   Component:  Compiler          |      Version:  6.13                   
    Keywords:                    |     Testcase:                         
   Blockedby:                    |   Difficulty:                         
          Os:  Unknown/Multiple  |     Blocking:                         
Architecture:  Unknown/Multiple  |      Failure:  Runtime performance bug
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Changes (by simonmar):

 * cc: ezyang (added)


Comment:

 Edward - this might be a good example to try with your new optimisation
 pass.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4065#comment:5>
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