That sounds about right Zawran.
I get really low fps here too, and I mean < 1fps. But, I like the product because it's such a tiny file to do this effect. I think we'll see Thygrion improving his technique and releasing some faster effects in the future.
Tindragon, this is your problem;
mov al, 13h
int 10h
Which is standard fare on most low byte assembly language intros, most of them use VGA mode 13h. Perhaps you'd be able to run them under dos box?