[GHC] #5549: ~100% performance regression in HEAD compared to ghc6.12, ~22% compared to 7.0.4

[GHC]

#5549: ~100% performance regression in HEAD compared to ghc6.12, ~22% compared to
7.0.4
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    Reporter:  tomaszw                 |        Owner:                         
        Type:  bug                     |       Status:  new                    
    Priority:  high                    |    Milestone:  7.4.1                  
   Component:  Compiler                |      Version:  7.3                    
    Keywords:  performance regression  |     Testcase:                         
   Blockedby:                          |   Difficulty:                         
          Os:  Linux                   |     Blocking:                         
Architecture:  x86                     |      Failure:  Runtime performance bug
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Changes (by simonmar):

  * priority:  normal => high
  * milestone:  => 7.4.1


Comment:

 let's add the program as a regression test, and look into the difference
 in allocations (if it's still there).

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5549#comment:3>
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