Performance problem

[Vladimir Baltchev]

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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