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Subject:	Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 1.7.33-0.1
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
Date:	Thu, 23 Oct 2014 08:14:39 +0200
To:	cygwin AT cygwin DOT com
Message-ID:	<4A980156-6E41-4DFE-BB6B-C85B791BAB35@cygwin.com>

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Hash: SHA512

On October 23, 2014 5:00:03 AM CEST, Tom Schutter <t DOT schutter AT comcast DOT net> wrote:
>On Wed 2014-10-22 11:23, Corinna Vinschen wrote:
>> The major change in this new release is the new method to read
>account
>> (passwd and group) information from the Windows user databases
>directly,
>> without the requirement to generate /etc/passwd and /etc/group files
>to
>> generate Unix-like uid and gid.
>
>What do you think the performance implications of this change will be?

For most home users there will be not much of a difference, probably, but I'm not sure.

The older method reading the files was slow, because each exec'ed process had to reread the entire passwd and group files anew.  With small files this was probably sufficiently fast.

The new method will not have to read any files, though.  It reads all infos from the local SAM, and it cashes the user and primary group data right fron the start.  If i may hazard a guess, it should be slightly faster for most people.

For AD users the answer is probably an "it depends".  A slow network might be a problem.  But one advantage always is: No more reading /etc/passwd and /etc/group files in each exec'ed process.

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