[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
       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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 Upgrading from ghc 7.2 to 7.8 has slowed down our main application
 noticeably.  This is with 32-bit Windows.

 Here's some 7.2 numbers:
 {{{
   INIT    time    0.00s  (  0.00s elapsed)
   MUT     time  287.78s  (290.41s elapsed)
   GC      time   87.39s  ( 88.43s elapsed)
   EXIT    time    0.00s  (  0.00s elapsed)
   Total   time  375.63s  (378.86s elapsed)
 }}}

 And corresponding 7.8 numbers:
 {{{
   INIT    time    0.00s  (  0.00s elapsed)
   MUT     time  298.34s  (301.35s elapsed)
   GC      time   88.16s  ( 89.27s elapsed)
   EXIT    time    0.00s  (  0.00s elapsed)
   Total   time  386.93s  (390.62s elapsed)
 }}}

 This is not unexpected since every ghc upgrade so far has slowed down out
 code; it's just following the trend we expect.

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