Does anyone else get sudden fps issues?

Hi :)

The recent few patches for me, but maybe some others, i have randomly been getting random fps mess ups. During a game, my fps (for me again) was at a fine 35. But as the game rolls on, somewhere at 15 minutes, everything goes haywire. I get stuck juggling between 10 and 1 fps, which screws everything over. I remember when fps drops would go somewhere at like 7 and 10 and not lag as much, but this one is much more "deadlier". Just want to share coz keep having to repair the client for corrupt files. Should i re-install?