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Date:	Fri, 13 Oct 2000 18:51:59 -0500
To:	cygwin AT sourceware DOT cygnus DOT com
From:	Chris Abbey <cabbey AT chartermi DOT net>
Subject:	Re: Cygwin Performance Info
In-Reply-To:	<39E7997E.242E9C9A@SunyataSystems.Com>
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At 19:23 10/13/00 -0400, Laurence F. Wood wrote:
>Can someone tell me where the performance hit is in cygwin unix
>emulation?

whichever part you use the most inside your tightest inner loop.

seriously.

that's a big huge open ended question (not about cygwin, about ANY
library/platform) that is as specific to your application as you can
get. For example, if you spend 75% of your computing day manipulating
text files and piping them and greping them and running file utils
against them then the cr/lf translation may be a big hit for you.
On the otherhand if most of your computation in a day is spent answering
requests that come in on tcp/ip sockets then the remapping of winsock
to netinet.h functions maybe your major headache. (note, I'm not trying
to imply that either function has a performance problem, merely that they
would be representative places that would have high invocation counts
in the course of the given activity.)

To really answer that for your application/workload then you need to
get some form of performance detailing that can tell you how much time
you are spending in any given method and how often it's called.


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