[GHC] #9291: Don't reconstruct sum types if the type subtly changes
GHC
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Thu Jan 5 15:21:29 UTC 2017
#9291: Don't reconstruct sum types if the type subtly changes
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Reporter: schyler | Owner: nomeata
Type: feature request | Status: closed
Priority: normal | Milestone:
Component: Compiler | Version: 7.8.2
Resolution: fixed | Keywords:
Operating System: Unknown/Multiple | Architecture:
Type of failure: Runtime | Unknown/Multiple
performance bug | Test Case:
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s): Phab:D2871
Wiki Page: |
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Comment (by nomeata):
> Will you revisit the -O2 inclusion sometime later? /me was always under
the impression that all performance-increasing optimisations from -O would
be included in -O2.
Oh, of course it is in `-O2`! The question is whether it should only be in
`-O`.
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9291#comment:45>
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