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Message-ID: <3A898FA0.6895B5CA@yahoo.com>
Date: Tue, 13 Feb 2001 14:48:48 -0500
From: Earnie Boyd <earnie_boyd AT yahoo DOT com>
Reply-To: Earnie Boyd <cygwin AT cygwin DOT com>
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To: jik-cygwin AT curl DOT com
CC: cygwin AT cygwin DOT com
Subject: Re: Optimizing away "ReadFile" calls when Make calls stat()
References: <20010213183634 DOT 1435 DOT qmail AT lizard DOT curl DOT com> <3A89867C DOT 395FC4E3 AT yahoo DOT com> <20010213191450 DOT 15506 DOT qmail AT lizard DOT curl DOT com>
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jik-cygwin AT curl DOT com wrote:
> 
> >  Date: Tue, 13 Feb 2001 14:09:48 -0500
> >  From: Earnie Boyd <earnie_boyd AT yahoo DOT com>
> >
> >  This sounds very interesting but I believe work to eliminate TWO
> >  ReadFiles would be best; but, I don't know if this is possible.
> 

I stated this sloppy.  My intention was as you've discussed already with
Larry.

> I don't understand what you mean.  The experiment I did yesterday
> *did* eliminate both ReadFiles.  However, I don't think Make can
> eliminate both ReadFiles *by default* because Make can't assume that
> the user doesn't use any symlinks unless the user tells it to assume
> that.
> 
> >  I have found the following set of GCC flags to have great impact
> >  with the speed with wish Cygwin flies.
> 
> How gcc should be called when compiling Cygwin is an interesting
> question, but it's not the one I'm asking here.  I hope the people
> from RedHat who compile the Cygwin packages that go up on the Web
> sites consider your suggestion, though :-).
> 

You are looking for ways to "speed up execution".  I was suggesting you
try the suggested switches as another means to speed up execution.  I
can rebuild the Cygwin dll in ~10 minutes doing a `make clean && make'.

BTW, repetitive stats are already cached which can be seen by timing an
`ls /bin' repetitively.  Also, Cygwin will always be slower than Linux. 
Win32 is just slower.  It's like comparing a tortoise with a hare.

Earnie.

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