Re: how much time?

From:

James Kanze <james.kanze@gmail.com>

Newsgroups:

comp.lang.c++

Date:

Fri, 5 Sep 2008 05:40:38 -0700 (PDT)

Message-ID:

<65ce1531-bbd7-4aa3-9d8d-0024dc14d3bc@c65g2000hsa.googlegroups.com>

On Sep 5, 12:02 pm, carlosp <carlospgma...@gmail.com> wrote:

I am aware that this is, technically, not a question about c++
but surely here someone will now-how-to. I have a program,
with lots of routines, and complicated stuff. I want to
optimize it but I don't want to optimize all the parts, but
rather the ones in which it takes longer. Of course one can
put time logs in the program, but there must be an efficient
way on how to do it. If someone can point out a few keywords
or commands in gdb or other linux debugger or something else,
I would be quite pleased. Thanks a lot!

The tool you're looking for is called a profiler. Under Linux,
there's gprof, which is quite good.

Typically, you'll also have to compile with special options: for
gprof, you'll need -pg with g++, but check the documentation.

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