[GHC] #7258: Compiling DynFlags is jolly slow

[GHC]

#7258: Compiling DynFlags is jolly slow
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        Reporter:  simonpj           |                Owner:  simonpj
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.6.1
      Resolution:                    |             Keywords:  deriving-perf
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 > What about using a different kind of data structure like a map or
 similar

 Of course that the first thing we should do, once we are convinced that's
 where the time is going! (We only ave suggestive evidence so far.)  Small
 maps should be cheap; that's the business of the containers library.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7258#comment:66>
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