Well , I don't have a high end device , my computer is pretty old.
i have 4 gigs of ram
an intel core 2 quad q6600 2.4ghz
and a gts 450 overclocked by gigabyte.
I started playing the game and got really bumped by how the game is running for me (horrible)
so i did a little search around the webz and found this "-cpucount=4"
This increased my performance so much , i actually enjoy playing the game now.
If you have some low fps , give this a shot , it helped me. A lot.