[GHC] #7850: Strangely high memory usage on optimized Ackermann function

[GHC]

#7850: Strangely high memory usage on optimized Ackermann function
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Reporter:  dolio                    |          Owner:                
    Type:  bug                      |         Status:  new           
Priority:  normal                   |      Component:  Compiler      
 Version:  7.6.2                    |       Keywords:                
      Os:  MacOS X                  |   Architecture:  x86_64 (amd64)
 Failure:  Runtime performance bug  |      Blockedby:                
Blocking:                           |        Related:                
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Changes (by adinapoli):

  * os:  Linux => MacOS X
  * architecture:  Unknown/Multiple => x86_64 (amd64)


Comment:

 If It might be of any help, I reproduced it on Mac OS X 10.8 with GHC
 7.6.2 as well.
 Profiling reveals an humongous allocation of Pinned Memory:

 http://heap.ezyang.com/view/6fb7441b501c00f428126f6b6e767d2412f43c2c#form

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7850#comment:9>
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