[GHC] #13059: High memory usage during compilation

GHC ghc-devs at haskell.org
Wed Feb 15 15:00:42 UTC 2017


#13059: High memory usage during compilation
-------------------------------------+-------------------------------------
        Reporter:  domenkozar        |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.2-rc2
      Resolution:  fixed             |             Keywords:  Generics
Operating System:  Unknown/Multiple  |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #5642, #11068     |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by RyanGlScott):

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


Comment:

 I honestly don't think there's a consistent rule that you shouldn't inline
 any default method implementations. Rather, this is a very particular case
 where inlining a chain of `GHC.Generics`-related instance methods together
 leads to high memory usage, which feels more like a bug than anything.

 My vote is to close this and pursue the discussion in #5642 and #11068,
 where this behavior has been observed before. Feel free to reopen if you
 disagree.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13059#comment:23>
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