Re: Profiling under Linux

[Jiří Paleček]

On Thu, 05 Nov 2009 21:59:40 +0100, Ignoramus11615  
<ignoramus11615@nospam.11615.invalid> wrote:

> I have a C++ program that is slower than I would like.
>
> I would like to use a profiler that would tell me in what functions is
> it spending the most actual time.
>
> gprof seems like an interesting tool, but I would like to know if
> there are other alternatives.

There are alternatives, among others:

 - oprofile, which gives coarse, but based on real performance data (taken  
from the performance counters in the CPU)

 - valgrind --tool=callgrind, which gives very detailed data, which are  
however based on simulation

None of these require you to recompile the program.

> The issue is that I have a particular program that is slower under
> Windows than it is under Linux, and I want to know why that is the
> case.

I'm afraid profiling on Linux won't show you why it's slower on Windows.

Regards
    Jiri Palecek