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Date:	Tue, 13 Feb 2001 13:27:30 -0800
From:	jfaith AT lineo DOT com
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To:	"Larry Hall (RFK Partners, Inc)" <lhall AT rfk DOT com>, cygwin AT cygwin DOT com
Subject:	Re: Optimizing away "ReadFile" calls when Make calls stat()
References:	<20010213195439 DOT 17755 DOT qmail AT lizard DOT curl DOT com>
	<20010213183634 DOT 1435 DOT qmail AT lizard DOT curl DOT com> <3A89867C DOT 395FC4E3 AT yahoo DOT com>
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X-MIMETrack:	Serialize by Router on lnwestlake/Lineo(Release 5.0.5 |September 22, 2000) at
	02/13/2001 03:34:24 PM,
	Serialize complete at 02/13/2001 03:34:24 PM

"Larry Hall (RFK Partners, Inc)" wrote:

> At 03:25 PM 2/13/2001, DJ Delorie wrote:
> > > Win32 is slower, but not THAT much slower.
> >
> >Actually, it is.  I did some benchmarks using the native Win32 API
> >directly, and Linux is way faster.
>
> Any chance that you have a pointer to the results of such a test?  Just
> curious.

Althought not related to the performance of stat() ... to get a feel for
where time was being spent during a make on Cygwin, I did an experiment a
while ago to compare process launching on Linux versus Win32.  The test
script just did "make --version > /dev/null" one thousand times.  This is
how long it took, all done on the same hardware:

Linux: 3 sec.
VMWare running Linux: 9 sec.
DOS (batch file) 18 sec.
Cygwin: 30 sec.

One thing which can help build performace is to pass several C files at
once to gcc, if it's possible to work it into your build procedure.

--
John Faith
Lineo



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