Performance problem

[Vladimir Baltchev]

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
>
> <http://cygwin.com/licensing.html>
>
> for more details.
>
>


-- 
Vladimir Baltchev
Senior Software Developer @ Orthosoft R&D Inc
Tel (514) 861-1837 ext 230
Email: Vladimir.Baltchev@orthosoft.ca



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