In console (~ key) type in command “stat game” and “stat slow” which will give you time of how much each step of frame composition take and see what causes the slow down. Note that if you run something on tick you only have 16ms (most likely less then that) to maintain 60FPS and blueprint (at least in editor since you can turn nativisiation in packaing) is 10x slower then native code, so looping array on tick with blueprint is costly. Also check if you don’t do any other heavy operations like Get All Actors of class and such on tick.