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From: "John" <John DOT Portal AT btinternet DOT com>
Newsgroups: comp.lang.c,comp.os.msdos.djgpp,comp.compilers.lcc
Subject: Re: hash library - interface criticisms
Date: Sun, 20 Jan 2002 19:22:17 -0000
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To: djgpp AT delorie DOT com
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"Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il> wrote in message
news:3C4B0ED1 DOT 3F274F98 AT is DOT elta DOT co DOT il...
> John wrote:
> >
> > To free the same 500,000 nodes it takes 9,236ms, and the
> > code in this case is only walking through the list and calling free().
>
> I think the DJGPP implementation of malloc is optimized for allocations
more
> than deallocations.  But you can easily see where're the hot spots if you
> compile malloc.c from the library with -pg, link with -pg, and then
profile
> the test program.  That's the beauty of Free Software: the sources are
> freely available to study and scrutinize.
>
> I have no idea what does lcc use in its library.

It uses crt.dll as default but one can link with msvcrt.lib and use
msvcrt.dll instead.

> Btw, a program should not need to free its heap before it exits.  The OS
> will take care about it.

That's true, but one's programme may need to free these allocations multiple
times whilst running.

John