When I run scaling I get between 0-1 less FPS with the screen full, the nearest neighbor scaling that is done when scale:2 is active takes nothing in percentage compared to the game, which in percentage is only a 5% difference from no scaling ಠ_ಠ. I could just have a weird computer though...
Since I know his computer is a bit old I was expecting low fps. So I didn't notice anything.
But still, I am going to pack a linux 64 bit binary without these effects. I will talk to Simon if he can do it for other architectures.