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X-HELO: calimero.vinschen.de
Date: Mon, 23 Feb 2015 22:15:54 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Cc: Roger Orr <rogero AT howzatt DOT demon DOT co DOT uk>
Subject: Re: slow startup after upgrade
Message-ID: <20150223211554.GA437@calimero.vinschen.de>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com, Roger Orr <rogero AT howzatt DOT demon DOT co DOT uk>
References: <20150213085748 DOT GN7818 AT calimero DOT vinschen DOT de> <1F2D7140EF4B469B90335ECF0A5690CB AT Tamar>
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Hi Roger,

On Feb 16 20:02, Roger Orr wrote:
> Corinna Vinschen wrote:
> > So I'd think the best way forward is to update to the
> > 1.7.35-0.1 test release and report further from there.=20=20=20=20=20
>=20
> Thanks, this does help a little. However I will still be using the 'files'
> setting.
>=20
> Here are some results in case they're of interest. (Windows 7/64 with
> cygwin/64.)
>=20
> 1) Running cygwin "echo.exe" from a cmd.exe command shell
>=20
> a) With passwd: files and group: files in /etc/nsswitch.conf
>   0.03 - 0.4 s
>=20
> b) With 1.7.34 and default /etc/nsswitch.conf
>=20
>   around 120s
>=20
> C) With 1.7.35 and default /etc/nsswitch.conf
>=20
>   4.4 - 4.6s

I rewrote the function responsible for the slow startup, the one
fetching all the group information for the groups in your user token.

As I just wrote in my mail to Dennis Hagarty, the performance improvement
should be noticable, even with /etc/nsswitch.conf only using the "db"
setting for groups.  The group info for a user token with 150 groups was
fetched in ~50 ms rather than the ~300ms of the former code.

Can you test this again with the Cygwin DLL from the latest developer
snaphshot at https://cygwin.com/snapshots/ please?


Thanks,
Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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