[GHC] #13745: Investigate compile-time regressions in regex-tdfa-1.2.2

[GHC]

#13745: Investigate compile-time regressions in regex-tdfa-1.2.2
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  high              |            Milestone:  8.2.3
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by rahulmutt):

 I recently merged the DmdAnal module from ghc master into Eta and observed
 a 2-3x blowup in generated codesize for the exact same module -
 Text.Regex.TDFA.NewDFA.Engine_FA. Given that the Eta code base does not
 yet contain the early inlining patch or anything relating to join points,
 I think one thing to be looking at is the impact of the new changes to the
 demand analyzer and how the inliner reacts to strictness/usage
 information.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13745#comment:15>
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