Anyone else have COD MWM lag?

Ive played cod mwm on the r4 for a little bit and ive noticed perceptible lag and a slow framerate. Im wondering if that is bc the graphics are so detailed and the ds itself is chugging. Does anyone else have this problem? Im thinking its the game or ds and not the r4 bc ive never had lag issues on any other game ive played on it.

yeah i have fps drop too sometimes on this game thats weird