[GHC] #10678: integer-gmp's runS seems unnecessarily expensive

[GHC]

#10678: integer-gmp's runS seems unnecessarily expensive
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        Reporter:  rwbarton          |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.10.1
  (CodeGen)                          |
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1103
       Wiki Page:                    |
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Comment (by nomeata):

 https://perf.haskell.org/ghc/#revision/351de169e14ad9277aaca653df4a3753c151f7bb
 looks great, good job!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10678#comment:18>
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