[GHC] #14683: Slow compile times for Happy-generated source

[GHC]

#14683: Slow compile times for Happy-generated source
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        Reporter:  harpocrates       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.2.2
      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 tdammers):

 First thing that stands out here is long lists of type vars in the
 generated code. Maybe something similar to #7258 is going on here? Going
 to investigate.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14683#comment:11>
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