[GHC] #4285: STM bug on Windows?

[GHC]

#4285: STM bug on Windows?
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    Reporter:  eevar           |       Owner:                         
        Type:  bug             |      Status:  new                    
    Priority:  normal          |   Component:  Runtime System         
     Version:  6.12.3          |    Keywords:                         
    Testcase:                  |   Blockedby:                         
          Os:  Windows         |    Blocking:                         
Architecture:  x86_64 (amd64)  |     Failure:  Runtime performance bug
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Comment(by eevar):

 Binaries would be too large, I'll attach the profiling output I have so
 far instead.

 The source is commit cfeec71ef93f1a632e82700d2c7a33f0f92d35bf from here:
 http://github.com/fffej/haskellprojects/tree/master/ants/ , but the
 problem's been present in all revisions I've tested.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4285#comment:1>
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