[GHC] #10293: CallArity taking 20% of compile time

[GHC]

#10293: CallArity taking 20% of compile time
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        Reporter:  simonpj           |                   Owner:  nomeata
            Type:  bug               |                  Status:  merge
        Priority:  high              |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:  fixed             |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by gidyn):

 Hard-coding the limit of 25 seems rash when there's only one data point
 (haskell-src-exts). This should probably be configurable at run-time until
 its had a lot more use out in the wild to see if this really is the best
 value in practice.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10293#comment:11>
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