[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 nomeata):

 > Compile-time setting (i.e. when building GHC)? At least that way they'll
 be some option for folks to play around with it if they think it's too
 high/low without actually changing the source code.

 That doesn’t gain you much over changing a number in the source file.

 Also, so far the existence of such folk is just hypothetical. Much more
 likely is that someone will fine data points for one or the other side of
 the limit („this code compiles too slowly“, „Call Arity did not fire even
 though it could“) and report that. Until there are such reports, it is
 safe to assume that it simply doesn’t matter.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10293#comment:15>
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