[GHC] #12754: Adding an explicit export list halves compilation time.

[GHC]

#12754: Adding an explicit export list halves compilation time.
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        Reporter:  mpickering        |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  invalid           |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by mpickering):

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


Comment:

 I don't know what I was doing but I can no longer reproduce this. Sorry
 for the noise, the code in `exports_from_avail` still looks like it could
 be more efficient.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12754#comment:1>
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