[GHC] #9646: Strange performance bug

[GHC]

#9646: Strange performance bug
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              Reporter:  erikd       |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.8.3
            Resolution:              |         Keywords:
      Operating System:  Linux       |     Architecture:  x86_64 (amd64)
       Type of failure:  Runtime     |       Difficulty:  Unknown
  performance bug                    |       Blocked By:
             Test Case:              |  Related Tickets:
              Blocking:              |
Differential Revisions:              |
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Comment (by jstolarek):

 Replying to [comment:3 erikd]:
 > @jstolarek : It looks you you do not have the criterion library
 installed.
 I have `criterion-1.0.1.0` installed in a cabal sandbox. Perhaps your make
 script does not recognize sandboxes?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9646#comment:4>
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