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From:	Marco Atzeri <marco DOT atzeri AT gmail DOT com>
Subject:	Re: Slowness with cygwin from behind a VPN
To:	cygwin AT cygwin DOT com
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Message-ID:	<90d55efa-d6c7-6497-7ee5-b76a5709b2ac@gmail.com>
Date:	Mon, 12 Sep 2016 22:37:06 +0200
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On 12/09/2016 16:42, ncoif wrote:
> Hi everyone,
>
> I've noticed a problem with a specific command on cygwin, but only when
> executed behind a VPN. I would like to know how to find more information
> about this problem, and/or how/where to report this potential bug.
>
> The following command is taking a lot of time behind a VPN (works fast
> without the VPN):
> cmd.exe /X /C "git --version"
> Running git --version works equally fast in both cases, so I would guess
> there is a problem in cmd.exe/cygwin, but I'm not sure. Any suggestion
> on how to gather more information about the network is welcome.
>
> My cygwin version:
> $ uname -r
> 2.6.0(0.304/5/3)
>
> My cmd.exe version:
> OS Name:                   Microsoft Windows 7 Enterprise
> OS Version:                6.1.7601 Service Pack 1 Build 7601
>
> My git version: 2.8.3
>
> Sincerely,
> ncoif
>
> PS: This is my first time on this mailing list, so please apologize for
> my mistakes.
>

probably the VPN is adding delays in recovering user or group data.
You can try if running cygserver improve the performance:

https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-mapping-caching

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