[GHC] #9961: compile-time performance regression compiling genprimcode

[GHC]

#9961: compile-time performance regression compiling genprimcode
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        Reporter:  hvr               |                   Owner:  simonpj
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.10.1
       Component:  Compiler          |                 Version:  7.10.1-rc1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by scpmw):

 Sorry for late reaction, somehow missed the mail. `lintAnnots` should only
 do something with `-dannot-lint` enabled. It will then be *very*
 expensive, because it runs every Core pass twice, and diff'ing Core can be
 almost arbitrarily costly.

 That being said, without `-dannot-lint` we should really have `lintAnnots
 pname pass guts = pass guts`. Not quite sure though how we get that much
 individual allocation on it, I'll investigate.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9961#comment:11>
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