[GHC] #13739: Very slow linking of profiled executables

[GHC]

#13739: Very slow linking of profiled executables
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        Reporter:  duog              |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1-rc2
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 I tried 8.2.1-rc2 and it took a similar amount of time (`real   0m6.241s
 user   0m0.013s sys    0m6.227s`) to link.

 However, then I tried 8.0.2 and indeed saw it was quite a bit faster
 (`real     0m2.888s user   0m0.009s sys    0m2.878s`). I still don't know
 you ended up seeing two minute link times though.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13739#comment:2>
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