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

[GHC]

#12357: Increasing maximum constraint tuple size significantly blows up compiler
allocations
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:
            Type:  bug               |               Status:  patch
        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):  Phab:D2400,
       Wiki Page:                    |  Phab:D2414
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Changes (by bgamari):

 * status:  new => patch
 * differential:  Phab:D2400 => Phab:D2400, Phab:D2414


Comment:

 Here's a first cut at a fix. Currently have a validation running and I
 likely need to do another pass over the comments when I'm less tired.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12357#comment:34>
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