Just tried to really fly online for the first time after the recent patches. Earlier this week I was joining servers just to finetune some online missions watching others playing with external views.
To my surprise today inside a cockpit my fps was only about 25-30 compared to 35-50 before recent patches and I started to think I messed up either .net or recent video drivers installation as I reinstalled them after the patches.
As I decided to disconnect and go through all installation procedure once again with quite enough disappointment I alt-tabed to desktop to doublecheck if I forgot to close Firefox browser. The browser was closed but I noticed that I forgot another usual procedure which is launching Gamebooster before playing ArmA2 or CoD. I did not think it would save me from reinstalling all the .net, directx and videodrivers but launched it just as a habit to have everything in order. I alt-tabed back to game and to my huge surprise I saw my usual 35-50 fps and a Bf-109 on my 6.
I new Gamebooster helps to prevent occasional stutters or can give you 2-3 fps unloading some small utilities from memory but I never thought it can make such a difference. Probably it stopped some windows process or an utility conflicting with CoD somehow or eating too much resources.
Just proved to myself that Gamebooster or similar software is a must especially for those who is not happy with CoD performance. Please do not say the game is not optimized before you optimize your PC.
http://www.iobit.com/gamebooster.html