Hi,
since build 08_27 a custom blitter has been implemented for both rescaling the screen and for blitting shaded battlescape tiles. Two places where the "standard" SDL methods proved to be a slowdown.
This should normally result in higher FPS (and less RAM usage in battlescape due to disabling of caching).
In the included screenshot you see the effect on my pc (it's about 150% FPS gain) and 4,2 Mb less ram used.
I would like to know if the same improvements are visible on other systems. I hope it is not going to slow down on any kind of configuration and no new bugs are introduced.