X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=4.1 required=5.0 tests=AWL,BAYES_05,BOTNET,RCVD_IN_DNSWL_NONE X-Spam-Check-By: sourceware.org Message-id: <4C092F96.5040800@cygwin.com> Date: Fri, 04 Jun 2010 12:53:42 -0400 From: "Larry Hall (Cygwin)" Reply-to: cygwin@cygwin.com User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.21) Gecko/20090320 Remi/2.0.0.21-1.fc8.remi Lightning/0.9 Thunderbird/2.0.0.21 Mnenhy/0.7.5.0 MIME-version: 1.0 To: cygwin@cygwin.com Subject: Re: Cygwin Performance and stat() References: <4C03D6C5.4050004@x-ray.at> <80373222dd5d43b134a5ede7036e7674.squirrel@www.webmail.wingert.org> <20100602080626.GV16885@calimero.vinschen.de> <383c8b44a088dad09a0b77d3299feda7.squirrel@www.webmail.wingert.org> <20100602174848.GA14172@ednor.casa.cgf.cx> <20100603235944.GA12167@ednor.casa.cgf.cx> <20100604024422.GB12167@ednor.casa.cgf.cx> <78e7b77657c0cfcd63dc22ad9679bc85.squirrel@www.webmail.wingert.org> <20100604045807.GC12167@ednor.casa.cgf.cx> <2570318aabfa537bf24c8d3a55f9dcd4.squirrel@www.webmail.wingert.org> In-reply-to: <2570318aabfa537bf24c8d3a55f9dcd4.squirrel@www.webmail.wingert.org> Content-type: text/plain; charset=UTF-8; format=flowed Content-transfer-encoding: 7bit Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: 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 6/4/2010 12:37 PM, Christopher Wingert wrote: > So here is an example of a performance gain by not using cygwin stat(). I > did this patch in about an hour (with the help of some git code), so I > wouldn't recommend it for any production use. > > On a dry run rsync from my local drive to my NAS (105GB, 34k files, 4k > directories). The current release cygwin rsync did it in [36m:43s], with > the patch (below) applied, it dropped to [04m:48s]. But your patch only does a portion of the work that stat() is supposed to do. I don't think there's any question that ignoring the need to fill in certain stat fields will save time. But that's not really a workable alternative either, if that's what you're implying. -- Larry Hall http://www.rfk.com RFK Partners, Inc. (508) 893-9779 - RFK Office 216 Dalton Rd. (508) 893-9889 - FAX Holliston, MA 01746 _____________________________________________________________________ A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting annoying in email? -- 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