compiling gtk apps on windows using gcc

[Hubert Sokolowski <h sokolowski wsisiz edu pl>]

Hi!

I am developing a gtk application. I found that on windows it runs
slowly then on linux. It is visible when my application draws lines and
rectangles to GdkPixmap and then to a window using 
gdk_draw_drawable. I was trying to add some optimisations flags to gcc
such as
-Wall -O2 -ffast-math -fomit-frame-pointer -fexpensive-optimizations -fs
trength-reduce -mno-cygwin -mcpu=pentium -mms-bitfields -mwindows
but that gave no results.
Is there any way to optimize the application so it will run on windows
as fast as on linux?


-- 
Greetings,
Hubert Sokolowski