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Date: Wed, 20 Feb 2002 19:42:02 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
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To: Eric Rudd <rudd AT cyberoptics DOT com>
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In-reply-to: <3C73BBE2.9289C4F6@cyberoptics.com> (message from Eric Rudd on
	Wed, 20 Feb 2002 09:08:19 -0600)
Subject: Re: Malloc/free DJGPP code
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> Date: Wed, 20 Feb 2002 09:08:19 -0600
> From: Eric Rudd <rudd AT cyberoptics DOT com>
> 
>    for (n=1; ; n++) {
>       data = realloc(data, n*sizeof(*data));
>       if (fscanf(infile, "%d", &data[n-1]) != 1) break;
>    }
> 
> (If blocks are allocated in sizes that are powers of two, there's no reason
> this last example can't be made to run fast -- though it's presently slow,

Is that with the CVS version or with the one in djdev203?  I believe
Mark made a change in CVS that speeds up realloc by a large factor.

> By these examples, I wish to encourage people to think broadly about the
> malloc optimization question.  In particular, I think we can expect some
> objections if any aspect of performance is significantly worsened, even
> though a new malloc performs better in some other respect.

I can only repeat that DJ's malloc test programs from the time v2.0
was developed are still available, and it's probably a good idea to
run them in case of any significant changes in malloc.  IIRC, those
programs did try to simulate different types of allocation requests.