X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Date: Wed, 2 Jun 2010 10:06:26 +0200 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: Cygwin Performance and stat() Message-ID: <20100602080626.GV16885@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <20100530170747.GA8605@ednor.casa.cgf.cx> <4C03D6C5.4050004@x-ray.at> <80373222dd5d43b134a5ede7036e7674.squirrel@www.webmail.wingert.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <80373222dd5d43b134a5ede7036e7674.squirrel@www.webmail.wingert.org> User-Agent: Mutt/1.5.20 (2009-06-14) Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com On Jun 1 14:42, Christopher Wingert wrote: > I think there are a lot of use cases where the extra information (ACL > information *I assume* is the majority of the problem) is unnecessary. > For most of the applications filename, size, and the three dates are all > that is necessary. So cygwin stat is overkill. So if I can tell the > emulation layer (via an environment flag) or the actually utility > (bash/ls/make/find/du) via a command line switch, I think I can save a lot > of time waiting. > > Just to highlight how bad this problem is. I have a network drive with > 681 sub directories and approximately 90k files. A time comparison for > getting directory information as follows: > > *DOS "dir /s" takes 17 seconds. > *Cygwin "ls -lR" takes 5950 seconds (that's almost two hours). > *msls -lR takes 55 seconds. > *myls (see code below) takes 7 seconds. > > Each test was done twice and after a reboot to make sure there was no > caching involved. > > To be clear, Cygwin ls is 850X slower. Did you try to mount the network drive with the "noacl" mount option? That skips requesting the owner/group information. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple