X-Recipient: archive-cygwin AT delorie DOT com X-SWARE-Spam-Status: No, hits=-2.4 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS X-Spam-Check-By: sourceware.org Message-ID: <49C2D5F1.3000700@cygwin.com> Date: Thu, 19 Mar 2009 19:32:01 -0400 From: "Larry Hall (Cygwin)" Reply-To: cygwin AT cygwin DOT com User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.19) Gecko/20090101 Remi/2.0.0.19-1.fc8.remi Lightning/0.9 Thunderbird/2.0.0.19 Mnenhy/0.7.5.0 MIME-Version: 1.0 To: cygwin AT cygwin DOT com Subject: Re: ls -lR too slow References: <49C2AFD1 DOT 6060000 AT princeton DOT edu> In-Reply-To: <49C2AFD1.6060000@princeton.edu> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com On 03/19/2009, Vinod Gupta wrote: > "smbntsec" made a huge difference, a factor of 10x! "ls -lR /cygdrive/z" > still transferred 10 MB, 50x more than "DIR /S Z:" but far better than 400x > it was doing with "nosmbntsec". It improves rsync too which does some thing > similar to "ls -lR" to get file mtime and size etc to filter files. I think > 50x factor sounds still too high. I thought the Cygwin overheads were of > the order of 3x or so. Can we squeeze another order of magnitude? You'd need to find a way to get rsync to not require the similar task that '-l' performs for 'ls'. But before you spend any effort on that, you might want to compare 'ls -R /cygdrive/z' and 'DIR /S Z:'. That would be the "theoretical" limit for Cygwin's speed increase in this situation at this point. If there's a good gain there, and I would expect a decent one, then exploring a way to get rsync operation closer to this would be a benefit. -- 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? -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/