[GHC] #9234: Compiled code performance regression

[GHC]

#9234: Compiled code performance regression
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        Reporter:  augustss      |            Owner:
            Type:  bug           |           Status:  new
        Priority:  low           |        Milestone:
       Component:  Compiler      |          Version:  7.8.2
      Resolution:                |         Keywords:
Operating System:  Windows       |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |       Difficulty:  Unknown
       Test Case:                |       Blocked By:
        Blocking:                |  Related Tickets:
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Comment (by augustss):

 I did try to profile two different ghc versions another time to find out
 what happened, but the profile is very "smeared out", i.e., many things
 using a little time.  The previous time I tried there was nothing that
 stuck out; everything just got a little slower.

 The trend is fairly consistent, we lose 3-10% performance on every ghc
 upgrade.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9234#comment:4>
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