I experienced a bit of frame rate dips in gameplay (especially when there was a lot happening on screen). (switchera.net)
In terms of technical performance, it suffers occasionally from minor frame rates dips, but rarely do these affect the gameplay in a negative way. (n64today.com)
As with many games this generation, the PS4 version of Arkham Knight has some occasional frame rate dips. (gamingtrend.com)