X-Recipient: archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status: No, hits=-2.6 required=5.0 	tests=BAYES_00,SPF_HELO_PASS,SPF_PASS
X-Spam-Check-By: sourceware.org
Message-ID: <26226567.post@talk.nabble.com>
Date: Thu, 5 Nov 2009 21:57:33 -0800 (PST)
From: aputerguy <nabble AT kosowsky DOT org>
To: cygwin AT cygwin DOT com
Subject: Re: 1.7] BUG - GREP slows to a crawl with large number of matches   on a  single file
In-Reply-To: <20091106033243.GB30410@ednor.casa.cgf.cx>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
References: <26224019 DOT post AT talk DOT nabble DOT com> <4AF393C6 DOT 3000505 AT tlinx DOT org> <20091106033243 DOT GB30410 AT ednor DOT casa DOT cgf DOT cx>
X-IsSubscribed: yes
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
List-Id: <cygwin.cygwin.com>
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com


OK. Here is a simple test case:


X=100000
while [ $X -gt 0 ] ; do echo "The quick brown fox jumped over the lazy dog"
; let X=X-1; done  > testfile

time grep dog testfile | wc

Cygwin 1.5:
real    0m0.219s
user    0m0.232s
sys     0m0.045s

Cygwin 1.7:
real    7m46.575s
user    7m14.138s
sys     0m0.076s

While using sed on Cygwin 1.5, I get the reasonable result:
time sed -ne /dog/p testfile | wc

real    0m1.229s
user    0m1.202s
sys     0m0.046s


-- 
View this message in context: http://old.nabble.com/1.7--BUG---GREP-slows-to-a-crawl-with-large-number-of-matches-on-a-single-file-tp26224019p26226567.html
Sent from the Cygwin list mailing list archive at Nabble.com.


--
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