CoD performance fix
 

This worked for me and thought I would share it for you all to try as well.

1) Turn anti epilepsy filter off:

Go to C:\Users\[username]\Documents\1C SoftClub\il-2 sturmovik cliffs of dover

find conf.ini and

In [BOB] section in write this line:
AntiEpilepcy = 0


2) The game only uses 1 core, to use several cores:

In [rts] section uncomment ProcessAffinityMask= and use these values:

2 cores - 3
3 cores - 7
4 cores - 15
6 cores - 63
8 cores - 255