[GHC] #15164: Slowdown in ghc compile times from GHC 8.0.2 to GHC 8.2.1 when doing Called arity analysis

[GHC]

#15164: Slowdown in ghc compile times from GHC 8.0.2 to GHC 8.2.1 when doing Called
arity analysis
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        Reporter:  flip101           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by nomeata):

 Which module in particular is showing the slow down?

 Does the problem go away if you `derive` less classes (in particular,
 `Data`)? (Unlikely, your data types are not big, but still worth
 checking.)

 Does the problem go away with `-fno-call-arity`? (Using this flag might be
 a suitable work-around for you to continue with your actual program.)

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15164#comment:4>
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