Final Fantasy Tactics: The War of the Lions

[TheDax]

If you're referring to the game slowing down when a spell or sword art is used (with your last bit about the animations), that's how the game was designed. Square Enix designed the game to slow down to 15 FPS or less when using spells. If you look further back in this thread, there was quite a bit of discussion about it.

Or are you referring to a different type of lag/slowdown that isn't related to that?