X-Recipient: archive-cygwin@delorie.com
X-Original-To: cygwin@cygwin.com
Delivered-To: cygwin@cygwin.com
DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 52E04385841E
Authentication-Results: sourceware.org;
 dmarc=none (p=none dis=none) header.from=theworld.com
Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=theworld.com
MIME-Version: 1.0
Message-ID: <24956.15977.882463.257590@gargle.gargle.HOWL>
Date: Fri, 29 Oct 2021 14:33:13 -0400
From: bzs@theworld.com
To: moss@cs.umass.edu
Subject: Re: Curiosity about file access performance
In-Reply-To: <8e3852d7-d2d4-0af5-ec15-a7865cd7216d@cs.umass.edu>
References: <00895c47-8df9-1f17-baac-0b3560de9d1c@cs.umass.edu>
 <20211029191434.737060387e2007319bcf3894@nifty.ne.jp>
 <8e3852d7-d2d4-0af5-ec15-a7865cd7216d@cs.umass.edu>
X-Mailer: VM 8.2.0b under 27.2 (x86_64-pc-linux-gnu)
X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS,
 NICE_REPLY_A, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL,
 SPF_HELO_PASS, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on
 server2.sourceware.org
X-BeenThere: cygwin@cygwin.com
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe: <https://cygwin.com/mailman/options/cygwin>,
 <mailto:cygwin-request@cygwin.com?subject=unsubscribe>
List-Archive: <https://cygwin.com/pipermail/cygwin/>
List-Post: <mailto:cygwin@cygwin.com>
List-Help: <mailto:cygwin-request@cygwin.com?subject=help>
List-Subscribe: <https://cygwin.com/mailman/listinfo/cygwin>,
 <mailto:cygwin-request@cygwin.com?subject=subscribe>
Cc: cygwin@cygwin.com
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Errors-To: cygwin-bounces+archive-cygwin=delorie.com@cygwin.com
Sender: "Cygwin" <cygwin-bounces+archive-cygwin=delorie.com@cygwin.com>


I/O to/from /dev/zero or /dev/null could be special-cased.

Benchmarking file system performance can be fraught.

-- 
        -Barry Shein, co-author of nfsstones benchmark

Software Tool & Die    | bzs@TheWorld.com             | http://www.TheWorld.com
Purveyors to the Trade | Voice: +1 617-STD-WRLD       | 800-THE-WRLD
The World: Since 1989  | A Public Information Utility | *oo*

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple