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Date:	Wed, 3 Oct 2012 09:04:48 -0400
From:	Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Fifo blocking and performance issues
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On Wed, Oct 03, 2012 at 08:29:21AM -0400, Earnie Boyd wrote:
>On Tue, Oct 2, 2012 at 3:15 PM, bob wrote:
>>While this hack works the performance under Cygwin is orders of
>>magnitude slower than the equivalent Linux performance.
>>
>>Any suggestions on how we can achieve a higher performance blocking
>>read on a Cygwin RDWR fifo?
>>
>
>You expect too much, it is Windows under the hood and no one but
>Microsoft can change that performance issue.  Windows alone (meaning
>without Cygwin) is orders of magnitude slower than Linux.  Cygwin adds
>another layer of slowness just because of the emulation required.  You
>might get a tweak or two of milliseconds by modifying some underlying
>code but you're not going to get too much more.

But, again, if we are talking about differences in behavior which are
not simply "Linux is faster" then provide a simple test case which works
one way on Linux and another on Cygwin and I'll look into fixing the
problem.

cgf

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