[GHC] #13930: Cabal configure regresses in space/time

[GHC]

#13930: Cabal configure regresses in space/time
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13982            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by osa1):

 I can't reproduce this with ghc 8.5.20180115 and cabal HEAD. configure
 uses about the same (and very little) amount of memory.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13930#comment:8>
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