X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org X-IronPortListener: Outbound_SMTP Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Subject: RE: Re: find . -regex '.*js' -type f -exec md5sum '{}' \\; really slow! Date: Mon, 24 Nov 2008 17:53:38 -0500 Message-ID: <31DDB7BE4BF41D4888D41709C476B6570C2AAE56@NIHCESMLBX5.nih.gov> In-Reply-To: References: <1227540449.7201.45.camel@LxPC35> <1227542582.7201.51.camel@LxPC35> <1227542941.7201.55.camel@LxPC35> From: "Buchbinder, Barry (NIH/NIAID) [E]" To: , "Matthew Woehlke" X-IsSubscribed: yes 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 mAOMsdgO000464 The following may technically be off-topic. If so, I apologize. Matthew Woehlke wrote on Monday, November 24, 2008 12:46 PM: > Bartolomeo Nicolotti wrote: >> but the command >> >> find . -type f | xargs md5sum >> >> has problems with blanks in the name of the files: >> [snip examples] > > find . -type f -print0 | xargs -0 md5sum I've found that find is significantly slower than native tools. (The following was run several times to fill any cached file system data.) local hard disk (C:): > time "$(cygpath -u "${COMSPEC}")" /c dir /s /b /a:-d | wc 16085 16308 690388 real 0m0.343s user 0m0.122s sys 0m0.170s networked drive: > time "$(cygpath -u "${COMSPEC}")" /c dir /s /b /a:-d | wc 1183 3093 66761 real 0m3.078s user 0m0.075s sys 0m0.108s > time find . -type f | wc ")" /c d 1183 3093 53748 real 1m0.813s user 0m0.216s sys 0m8.046s Therefore, you might consider using something like this if there are no symbolic links* and it doesn't offend your sensibilities. (* and other "oddities". I'm not sure how symbolic links work with find . -type f, so this might not be a problem.) "$(cygpath -u "${COMSPEC}")" /c dir /s /b /a:-d | \ tr -s '\r\n' '\n' | \ cygpath -u -f - | \ tr '\n' '\0' | \ xargs -r0 md5sum -- 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/