[GHC] #16032: Compile speed regression

[GHC]

#16032: Compile speed regression
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        Reporter:  augustss          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.6.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 Can you include the output from building with `ghc -v3`? That would help
 us at least pin down what compilation phase has slowed.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16032#comment:1>
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