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Date: Fri, 4 Jun 2010 10:07:58 -0700
Subject: Re: Cygwin Performance and stat()
From: "Christopher Wingert" <mailbox AT wingert DOT org>
To: cygwin AT cygwin DOT com
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Again, not production, this was to highlight a point and to enhance (I
would assume) the most common use case (file to file rsync).

Plenty of solutions for a good patch, complete the Windows version of
stat() or call the Cygwin version if the Window's version fails.

Since I don't have any confidence that the "Cygwin organization" will
accept any patch I write (per Faylor), I really have no incentive to do
the job right.

Chris



> On 6/4/2010 12:37 PM, Christopher Wingert wrote:
>> So here is an example of a performance gain by not using cygwin stat().
>> I
>> did this patch in about an hour (with the help of some git code), so I
>> wouldn't recommend it for any production use.
>>
>> On a dry run rsync from my local drive to my NAS (105GB, 34k files, 4k
>> directories).  The current release cygwin rsync did it in [36m:43s],
>> with
>> the patch (below) applied, it dropped to [04m:48s].
>
> But your patch only does a portion of the work that stat() is supposed to
> do.  I don't think there's any question that ignoring the need to fill in
> certain stat fields will save time.  But that's not really a workable
> alternative either, if that's what you're implying.
>
> --
> Larry Hall                              http://www.rfk.com
> RFK Partners, Inc.                      (508) 893-9779 - RFK Office
> 216 Dalton Rd.                          (508) 893-9889 - FAX
> Holliston, MA 01746
>
> _____________________________________________________________________
>
> A: Yes.
>> Q: Are you sure?
>>> A: Because it reverses the logical flow of conversation.
>>>> Q: Why is top posting annoying in email?
>
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