X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Subject: RE: find . -regex '.*js' -type f -exec md5sum '{}' \\; really slow! From: Bartolomeo Nicolotti To: =?ISO-8859-1?Q?J=F6rg?= Schaible Cc: cygwin@cygwin.com In-Reply-To: References: <1227540449.7201.45.camel@LxPC35> Content-Type: text/plain; charset=UTF-8 Date: Mon, 24 Nov 2008 17:03:02 +0100 Message-Id: <1227542582.7201.51.camel@LxPC35> Mime-Version: 1.0 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 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id mAOG4TdQ021106 Great! the command /usr/bin/find . -type f -exec md5sum '{}' \\; takes 3min 10s the command /usr/bin/find . -type f -exec md5sum \{} + takes 25s. the command find . -type f | xargs md5sum takes 17s Many thanks, best regards! B.Nicolotti Il giorno lun, 24/11/2008 alle 16.35 +0100, Jörg Schaible ha scritto: > cygwin-owner@cygwin.com wrote: > > Hi, > > > > I'm using the command: > > > > /usr/bin/find . -type f -exec md5sum '{}' \\; > > > > to compare the content of two subtree(161Mbytes) on different systems, > > one linux, and the other on windows with cygwin. > > > > The command on linux takes some seconds, while on windows+cygwin > > takes some minutes. > > > > Could some one help me to speed-up things on windows+cygwin? > > Don't run the command for each file, try to use as much files as you can on one line (use '+' instead of ';'): > > /usr/bin/find . -type f -exec md5sum \{} + > > Hint: A fork is expensive in Cygwin ... > > - Jörg -- Bartolomeo Nicolotti SIAP s.r.l. www.siapcn.it v.S.Albano 13 12049 Trinità(CN) Italy ph:+39 0172 652553 centralino: +39 0172 652511 fax: +39 0172 652519 -- 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/