Editing WoW:Cosmos (AddOn)/Cosmos FAQ (section)

==== Will Cosmos affect my FPS (Frames per Second)? ====
:Yes, to some degree. Cosmos causes the client to call additional functions at certain times. Inevitably this will result in minor slowdown, but it shouldn't be very much. If you're experiencing significant slowdown, something more serious is wrong. Please post on the [http://www.cosmosui.org/forums Cosmos Forums] detailing which AddOns you have installed, and which are active. In particular, you may wish to try temporarily disabling all of Thottbot except the personal profile collection or PartyQuests. If you're still having FPS issues and you're sure its Cosmos related, the DPS and Combat related mods would be next in line. At this point though, you should probably check your graphics settings and try turning down the terrain distance.