X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-1.3 required=5.0 tests=AWL,BAYES_00 X-Spam-Check-By: sourceware.org Message-ID: <383c8b44a088dad09a0b77d3299feda7.squirrel@www.webmail.wingert.org> In-Reply-To: <20100602080626.GV16885@calimero.vinschen.de> References: <20100530170747.GA8605@ednor.casa.cgf.cx> <4C03D6C5.4050004@x-ray.at> <80373222dd5d43b134a5ede7036e7674.squirrel@www.webmail.wingert.org> <20100602080626.GV16885@calimero.vinschen.de> Date: Wed, 2 Jun 2010 10:46:03 -0700 Subject: Re: Cygwin Performance and stat() From: "Christopher Wingert" To: cygwin@cygwin.com User-Agent: SquirrelMail/1.4.20 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit 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 Thanks for the pointer, I just gave it a whirl, it actually didn't make much of a difference. I am going to start looking into making a patch. Chris > 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 > > -- 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