In order to generate the cut-plane, the program will internally have to allocate a large amount of data. Keeping this data allocated after being done with the cut-plane is inefficient. It is best to call this method after being done with the cut-plane feature.
Also, it is best not to call this method after deleting every cut-plane. Since it will require the program to recalculate data once again. Keep such data (not calling this method), until after you are done with the cut-plane, or when you need a large amount of free memory.