Update from Riot kills FPS... again...especially during team fights (down to 5 fps)

Every couple patches, Riot is introducing a change that absolutely kills my FPS, especially during team fights. Yesterday, play was just fine, where I get a consistent 60 FPS which is great. Note that I have a new computer (< 6 months) and Google Fiber. And I already play with my video options set to very low, just because this happened before. Then today there was a 'minor' update, and now I only see about 12-20 fps. Then we have a team fight, and my FPS drops to about 5.

The last 3 times this happened, the next Riot patch fixes it.