#5102: ghc struggles to compile a large case statement
-------------------------------------------+--------------------------------
Reporter: espringe | Owner: igloo
Type: bug | Status: closed
Priority: normal | Milestone: 7.4.1
Component: Compiler | Version: 6.12.3
Resolution: worksforme | Keywords:
Testcase: | Blockedby:
Difficulty: | Os: Linux
Blocking: | Architecture: x86_64 (amd64)
Failure: Compile-time performance bug |
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Changes (by igloo):
* status: new => closed
* resolution: => worksforme
Comment:
I'm not sure what I'm looking for exactly. There are 33797 branches in the
case expression, and the peak memory (according to `+RTS -t`) is 200M. It
seems to be roughly linear in the number of branches.
That's about 6k bytes per branch, which is under 1000 words per branch.
That doesn't look too unreasonable for a branch like
{{{
"AANCOR" -> Just $ Pronunciation [AA1, N, K, AO2, R]
}}}
I don't think there's a specific problem here, although constant factor
improvements may well be possible. Please reopen if you disagree.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5102#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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