[GHC] #8158: Replace IO manager's IntMap with a mutable hash table

[GHC]

#8158: Replace IO manager's IntMap with a mutable hash table
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        Reporter:  bos         |            Owner:  AndreasVoellmy
            Type:  feature     |           Status:  patch
  request                      |        Milestone:  7.8.1
        Priority:  high        |          Version:  7.7
       Component:              |         Keywords:
  libraries/base               |     Architecture:  Unknown/Multiple
      Resolution:              |       Difficulty:  Easy (less than 1 hour)
Operating System:              |       Blocked By:
  Unknown/Multiple             |  Related Tickets:
 Type of failure:  Other       |
       Test Case:              |
        Blocking:              |
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Comment (by kazu-yamamoto):

 If you guys are interested in to make multicore IO manager faster, please
 give a look at witty: https://github.com/kazu-yamamoto/witty

 I think that the biggest bottleneck is the overhead of MVar.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8158#comment:13>
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