[GHC] #14969: Underconstrained typed holes are non-performant

[GHC]

#14969: Underconstrained typed holes are non-performant
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        Reporter:  johnleo           |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.5
      Resolution:                    |             Keywords:  TypedHoles
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:
  performance bug                    |  ghci/scripts/T14969
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by Tritlo):

 * status:  new => patch


Comment:

 A fix for this is included in https://phabricator.haskell.org/D4444, where
 we change the default sorting algorithm to one based on comparing sizes of
 types rather than subsumption, which is much faster and gives comparable
 results.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14969#comment:13>
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