[GHC] #5916: runST isn't free

[GHC]

#5916: runST isn't free
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        Reporter:  tibbe             |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.4.1
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime           |            Test Case:
  performance bug                    |  simplCore/should_run/runST
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 The new `runRW#` primop is just what the doctor ordered. See
 351de169e14ad9277aaca653df4a3753c151f7bb

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5916#comment:25>
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