nanogui: Thread: Bitmap speed

Hi,

I'm strugling with the speed of the bitmap load functions

Does anyone have done performance tests on the loading of bitmap in 
different types?

i'm interrested in the difference in loading png, jpeg, bmp and gif.

I have to find the best compromise between speed and image size!?
if someone can give me some hintson this it would save me lots of 
time in testing the performace.

Thanks in advance

Michael