[vector] #18: folds for unboxed vectors are slow.

[vector]

#18: folds for unboxed vectors are slow.
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Reporter:  Khudyakov  |        Owner:  rl 
    Type:  defect     |       Status:  new
Priority:  major      |    Milestone:     
 Version:  0.6        |   Resolution:     
Keywords:             |  
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Comment (by rl):

 See #19 for the SPEC problem.

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Ticket URL: <http://trac.haskell.org/vector/ticket/18#comment:3>
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