[GHC] #12357: Increasing maximum constraint tuple size significantly blows up compiler allocations

[GHC]

#12357: Increasing maximum constraint tuple size significantly blows up compiler
allocations
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        Reporter:  bgamari           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.3
      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 bgamari):

 One thing to point out here is that a significant amount of cost from this
 patch is due to the construction of the superclass dictionary selectors
 (e.g. `OccName.mkSuperDictSelOcc`), since we now have to construct a few
 thousand more selectors than we did previously.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12357#comment:4>
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