Date:	Tue, 06 Feb 2001 22:33:14 +0200
From:	"Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender:	halo1 AT zahav DOT net DOT il
To:	Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de>
Message-Id:	<6480-Tue06Feb2001223313+0200-eliz@is.elta.co.il>
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CC:	djgpp AT delorie DOT com
In-reply-to:	<95pk8j$ft4$1@nets3.rz.RWTH-Aachen.DE> (message from
	Hans-Bernhard Broeker on 6 Feb 2001 19:45:23 GMT)
Subject:	Re: Function and File ordering and speed optimization
References:	<3A8049B6 DOT 7C7B7BB1 AT msu DOT edu> <95pk8j$ft4$1 AT nets3 DOT rz DOT RWTH-Aachen DOT DE>
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> From: Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de>
> Newsgroups: comp.os.msdos.djgpp
> Date: 6 Feb 2001 19:45:23 GMT
> 
> Miguel A. Ballicora <ballicor AT msu DOT edu> wrote:
> > Dear dgjpp programmers,
> 
> > I have seen on the documentation that the profiler (gprof.exe) can give
> > an advice on how to sort the functions in the executable for speed
> > optimization. It gives me a list with all the functions. How do I
> > achieve that sorting on the executable? 
> 
> I don't think it makes any sense to even try. Except for situation
> which other compiler optimizations already should have taken care of,
> the relative position of functions in address space doesn't make any
> difference at all on x86 processors in 32 bit flat mode and using GCC.

???  One thing I'd do is to group functions which are called many
times together.  This would maximize the probability that they are in
the L1 cache most of the time.

Why did you think this was unimportant?  Am I missing something?

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