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Date: Wed, 25 Sep 2013 22:31:02 +0400
From: Andrey Repin <anrdaemon AT yandex DOT ru>
Reply-To: Andrey Repin <cygwin AT cygwin DOT com>
Message-ID: <1633457612.20130925223102@mtu-net.ru>
To: "Wm. David Bentlage" <slomium+cygwin AT gmail DOT com>, cygwin AT cygwin DOT com
Subject: Re: cp vs copy performance over local network
In-Reply-To: <CAJyLC6sbpLsGXpt2U8u1QOCw+7AhYuo73Q8e2V_K=fu7ujaKkg@mail.gmail.com>
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Greetings, Wm. David Bentlage!

> I've often noticed that there's a big difference in the performance
> between Cygwin cp and Windows copy over the local network -- cp
> usually takes twice as long for the same operation.  Here's an
> example:

> muser AT A4826995 /c/Users/Muser
> $ time cmd /c copy \\\\server\\w\\cygwin.zip .
>         1 file(s) copied.

> real    0m7.344s
> user    0m0.015s
> sys     0m0.046s

> muser AT A4826995 /c/Users/Muser
> $ time cp \\\\server\\w\\cygwin.zip .

> real    0m18.559s
> user    0m0.046s
> sys     0m2.432s

> muser AT A4826995 /c/Users/Muser
> $ uname -a
> CYGWIN_NT-6.1-WOW64 A4826995 1.7.17(0.262/5/3) 2012-10-19 14:39 i686 Cygwin

Is this the same for x86_64 Cygwin?

> muser AT A4826995 /c/Users/Muser
> $ ls -lh cygwin.zip
> -rw-r--r-- 1 muser Users 513M Sep 25 11:47 cygwin.zip

> Why is this?  Is there something I can do to increase the performance of cp?


--
WBR,
Andrey Repin (anrdaemon AT yandex DOT ru) 25.09.2013, <22:30>

Sorry for my terrible english...


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