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Re: C++ optimization: compile time + memory consumption regressionon gcc3.3 branch
- From: Karel Gardas <kgardas at objectsecurity dot com>
- To: "Michael S. Zick" <mszick at goquest dot com>
- Cc: GCC Mailing List <gcc at gcc dot gnu dot org>
- Date: Mon, 3 Mar 2003 15:20:36 +0100 (CET)
- Subject: Re: C++ optimization: compile time + memory consumption regressionon gcc3.3 branch
On Mon, 3 Mar 2003, Michael S. Zick wrote:
> On Monday 03 March 2003 04:30 am, Karel Gardas wrote:
> >
> > Yes, I hope profiling of gcc3.2.2 will be useless. I have whole output of
> > gprof compressed on my disc so if anyone is interested I can provide it on
> > direct request (~300kB bzip2 compressed file). Now I'll try to binary
> > search gcc-3_3-branch to find the problematic patch. Anyway if you find
> > the problematic patch by looking into gprof output above, please let me
> > know to save my time.
> >
> > Anything other what should I try?
> >
> You don't mention at what level you will do your binary search
> (source, intermediate, object), but...
I don't know yet, since this seems to be quite long time and even I find
the problematic patch, I guess it'll be useless (anyway I'll do it if any
developer think that it might be usefull). IMHO better approach will be to
fix the problem directly, but for this I don't have enough knowledge...
> Sometimes finding a regression with an effect scattered over the
> program can be found by swapping *.o's between the before and
> after trees.
Thanks for the hint, this is good to know...
Cheers,
Karel
--
Karel Gardas kgardas at objectsecurity dot com
ObjectSecurity Ltd. http://www.objectsecurity.com