Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm 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 X-Info: This message was accepted for relay by smtp03.mrf.mail.rcn.net as the sender used SMTP authentication X-Trace: UmFuZG9tSVZVnQx6aCmjNbFbH8E6XTICIKUsBWXr0VpEliJKC4WGs+LY7Gy4yUDk Message-ID: <3F0B1BF0.4020406@cygwin.com> Date: Tue, 08 Jul 2003 15:30:56 -0400 From: Larry Hall Reply-To: cygwin@cygwin.com User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030529 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Vladimir Baltchev CC: cygwin@cygwin.com Subject: Re: Performance problem References: <3F0B14B5.2000001@cygwin.com> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Some amount of benchmarking has been done. You can see the email archives for reports from various interested folks with their comparisons. If you haven't already, visit . The FAQ covers some common issues that may affect your results. However, it sounds to me from the general information you've provided that you're seeing 'normal operation'. Several times slower than Linux is not beyond expectations. Again, I point out that this doesn't mean there isn't the possibility of improvement. If you feel that there is actually a specific issue here, please feel free to report it as such. See if that's the case. Larry Vladimir Baltchev wrote: > Thanks Larry, > I know about the license. About the speed - it's several times slower... > May be it worth the effort to make some benchmarking... > Vlad > Larry Hall wrote: > >> Vladimir Baltchev wrote: >> >>> Hi there, >>> We are about to port Unix - Irix and Linux applications to Windows >>> using Cygwin. However the Cygwin version is very slow compared to >>> Linux, even I compiled with the optimize option -O2. It is a Windows >>> 2000, the program is a segmentation editor using Qt, OpenGl and some >>> image processing. >>> What is the reason? Is it OpenGL on cygwin, or both? >> >> >> >> >> You'd need to do some performance testing to figure out specifically >> where the bottleneck is for your applications. However, as you must >> be aware, Cygwin is a POSIX emulation layer. It's simply going to be >> slower than non-emulated environments and native environments. That >> said, you'll certainly be able to find performance issues in Cygwin >> that can be addressed to make it faster. We'd welcome efforts in >> this area. Also, keep in mind that Cygwin is under the GPL license. >> This means your applications' licenses would need to conform to the >> open source model if you plan to distribute it. Otherwise, you need >> to get a "buy out" license from Red Hat. See >> >> >> >> for more details. >> >> > > -- 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/