[GHC] #10289: compiling huge HashSet hogs memory

[GHC]

#10289: compiling huge HashSet hogs memory
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        Reporter:  zudov             |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Linux             |            Architecture:  x86_64
 Type of failure:  Runtime           |  (amd64)
  performance bug                    |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by simonpj):

 Well `-O0 -fno-ignore-interface-pragmas` is a bit of a funny combination.
 I can't say why memory use should be high then, but it's probably better
 to focus on `-O0` or `-O` or `-O2`, which are what people actually use.

 The difficulty here is it's hard to tell whether GHC is at fault, or the
 INLINE pragmas and/or RULEs in the libraries.  I just don't have time to
 investigate at the moment.  Maybe someone else does?

 I made a couple of suggestions in my previous comment.  If I was
 investigating, those are the things I'd try first.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10289#comment:3>
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