X-Authentication-Warning:	delorie.com: mailnull set sender to djgpp-bounces using -f
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
Lines:	31
Message-ID:	<a2f5c3$10q5s6$1@ID-97861.news.dfncis.de>
References:	<3C4ADB8E DOT 552CAE40 AT yahoo DOT com> <a2esv3$10teia$1 AT ID-97861 DOT news DOT dfncis DOT de> <3C4B0ED1 DOT 3F274F98 AT is DOT elta DOT co DOT il>
NNTP-Posting-Host:	host213-122-193-76.btinternet.com (213.122.193.76)
X-Trace:	fu-berlin.de 1011554500 34412422 213.122.193.76 (16 [97861])
X-Priority:	3
X-MSMail-Priority:	Normal
X-Newsreader:	Microsoft Outlook Express 5.50.4807.1700
X-MimeOLE:	Produced By Microsoft MimeOLE V5.50.4807.1700
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

"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

- Raw text -