#3664: Ghc eats tremendous heaps of RAM in -prof build (highlighting-kate)
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Reporter: slyfox | Owner:
Type: bug | Status: new
Priority: normal | Milestone: 6.12 branch
Component: Compiler | Version: 6.12.1 RC1
Resolution: | Keywords:
Difficulty: | Os: Linux
Testcase: | Architecture: x86_64 (amd64)
Failure: Compile-time performance bug |
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Comment (by igloo):
Replying to [comment:3 slyfox]:
> Replying to [comment:2 igloo]:
>
> > That PHP module includes a couple of 50000 character lines, mostly
composed of a list of strings. I suspect that's the problem, but haven't
profiled at all.
> >
> > It would be useful if someone could make a standalone, minimal
testcase.
> What is minimal? Will be enough to strip this package to 3 almost
unmodified .hs files but leave all external deps, like parsec and pcre-
light, or you would like it fully buildable with ghc --make ?
Eliminating external deps is the most important thing, as that makes it
much easier to try in a development compiler, or to compare 2 compilers.
Apart from that, just making it as small as possible means that it is
quicker to build, easier to see what is going on (in terms of both the
source code, and the compiler debugging output), and makes it easy to add
a regression test to the testsuite.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3664#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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