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Re: Re: Dreaming of a Better Profiler

by samtregar (Abbot)
on May 26, 2004 at 01:52 UTC ( #356429=note: print w/replies, xml ) Need Help??

in reply to Re: Dreaming of a Better Profiler
in thread Dreaming of a Better Profiler

Yes. It uses Perl's debugger hooks so it will almost certainly suffer from the same problems as Devel::DProf. As far as I was able to determine the bugs in Devel::DProf are actually bugs in Perl's debugger.


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Re: Re: Re: Dreaming of a Better Profiler
by Anonymous Monk on May 26, 2004 at 03:06 UTC

    I don't think so. I've used both. I've never had much luck with Devel::DProf. I've never had a problem with Devel::Profile.

    My understanding of the problem with Devel::DProf, is that is can't handle subs that don't return (exceptions, gotos, etc). Devel::Profile handles such situations.

      That's very interesting. A quick test against Krang shows that you are correct - it can profile krang_publish but Devel::DProf reliably seg-faults. I'm definitely going to study the code to see if I can figure out why it doesn't have the same problems as Devel::DProf, even though it uses the debugger.



        I just contributed some improvements to Devel::Profile that should make it more stable. Now the only bug I know for sure remains is actually in the core, namely, that you can't call an XS function from &DB::sub before you call &$DB::sub, or the target one gets the wrong default package. Yuck.

            -- Chip Salzenberg, Free-Floating Agent of Chaos

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