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From:	Bernard Dautrevaux <Dautrevaux AT microprocess DOT com>
To:	"'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com>
Subject:	RE: Optimizing away "ReadFile" calls when Make calls stat()
Date:	Fri, 16 Feb 2001 18:06:53 +0100
MIME-Version:	1.0
X-Mailer:	Internet Mail Service (5.5.2650.21)

> -----Original Message-----
> From: Christopher Faylor [mailto:cgf AT redhat DOT com]
> Sent: Friday, February 16, 2001 6:00 PM
> To: Cygwin-L
> Subject: Re: Optimizing away "ReadFile" calls when Make calls stat()
> 
> 
> On Fri, Feb 16, 2001 at 10:59:49AM -0500, Larry Hall (RFK 
> Partners, Inc) wrote:
> >At 04:34 AM 2/16/2001, Warren Young wrote:
> >>"Charles S. Wilson" wrote:
> >> > 
> >> > If I were porting an old app from unix to cygwin, and 
> wanted to tune
> >> > performance, I'd much rather do this:
> >>
> >>Both you and Jonathan have understood my intent perfectly.  
> >>
> >>Christopher, please do consider this proposal.  It's easy 
> to implement
> >>-- probably just a few tweaks on Egor's patch -- and it 
> makes it easy to
> >>gain performance with straightforward patches to affected programs. 
> >>It'd be nice if we can make Cygwin faster, but this proposal has an
> >>inherent advantage: the calling process _knows_ what it 
> wants, whereas
> >>Cygwin can only guess or anticipate.
> >>
> >>Egor, Jonathan, maybe some benchmarks would help convince 
> Christopher of
> >>the patch's utility.
> >
> >Chris sent some email about this yesterday.  He's looking at 
> the possibility
> >of eliminating this problem without changing the API.
> 
> Nice to see that *someone* is paying attention.


I, for one, is more than just paying attention; I just wondered if it was
worthless to add some traffic to an already quite long thread. 

I' REALLY waiting to see your solution; I myself expose my ideas on how to
do that, but I trust you to have found a solution a lot better than mine :-)


Thanks in advance for the good work,

	Berrnard
--------------------------------------------
Bernard Dautrevaux
Microprocess Ingenierie
97 bis, rue de Colombes
92400 COURBEVOIE
FRANCE
Tel:	+33 (0) 1 47 68 80 80
Fax:	+33 (0) 1 47 88 97 85
e-mail:	dautrevaux AT microprocess DOT com
		b DOT dautrevaux AT usa DOT net
-------------------------------------------- 

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