Refresh Rate Improvements

[Krakawet]

Hello, and thanks again tasanakorn for this beautiful piece of code <3 !

I was trying to improve the refresh rate of my touchscreen (around 10-12 fps):
I succefully removed the usleep(25 * 1000); command, gaining some FPS (seems around 12-15).
Fbcp still consume low CPU (<5% on Pi2), everything is fine :)

But is there any way to improve again this refresh rate (without scaling down resolution or depht).

Thank you !