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Performance problem


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?
Here is the library dependency list:
segeditorMax.exe
C:\cygwin\usr\X11R6\bin\libGL.dll
C:\cygwin\usr\X11R6\bin\libX11.dll
C:\cygwin\bin\cygwin1.dll
C:\winnt\System32\KERNEL32.dll
C:\winnt\System32\NTDLL.DLL
C:\cygwin\usr\X11R6\bin\libXext.dll
C:\cygwin\usr\X11R6\bin\libGLU.dll
c:\qt-cygwin\qt-3\bin\cygqt-mt-3.dll
C:\cygwin\usr\X11R6\bin\libICE.dll
C:\cygwin\usr\X11R6\bin\libSM.dll
C:\cygwin\usr\X11R6\bin\libXrender.dll
C:\cygwin\bin\cygpng12.dll
C:\cygwin\bin\cygz.dll
C:\winnt\System32\ADVAPI32.DLL
C:\winnt\System32\RPCRT4.DLL
c:\Vlad\build\Dev\lib\libOip.dll
C:\winnt\System32\GDI32.dll
C:\winnt\System32\USER32.DLL



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



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