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Why does Devel::DProf report so much time in BEGIN?

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Contributed by koolade on Aug 06, 2001 at 20:32 UTC
Q&A  > debugging


Description:

Using Devel::DProf on some of my programs produces output such as is found at Devel::Dprof is your friend, where most of the time is shown in MODULE::BEGIN. Does anyone know what that means when there are no BEGIN blocks in the module? Or does it just represent total calls to that module's subs?

Answer: Why does Devel::DProf report so much time in BEGIN?
contributed by mikfire

Without seeing your code, but having spent some time with Devel::DProf myself, I will guess that you are use'ing a number of modules.

If I remember correctly,

use foo;
is implemented as
BEGIN { require foo; import foo; }
So, even though you are not explicitly using BEGIN blocks, you are using them implicitly through any use statements.

I would delve into the correct manpages and verify my memory, but I am far from any machine with perl installed on it :( And I have no ssh to get to a machine I could so use.

mikfire

Answer: Why does Devel::DProf report so much time in BEGIN?
contributed by Anonymous Monk

After tirelessly searching for an answer to the same question (hence the search that turned up this page as a result), I ended up just tweaking my code until I got an answer. Several of my subroutines were missing from the DProf report until I removed all "use strict" and "use vars" lines from my code.

I really have no idea why this made a difference. Sure would be nice if it were better-documented.

Anyway, not sure if this helps you out 9 months after the fact, but thought I would share.

--Bob

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