I figured out why the performance/fps suddenly decrease in WIP 3061, it's because of the creation of large rbx (realbot experience) file(s). I figured this out when I was comparing Realbot's experience file with PODBot's experience file. I noticed that there is a large difference between the two because Realbot's experience file is over 2MB, while PODBot's experience file is under/less than 110/100KB.
When I deleted the rbx (realbot experience) file, the game ran smoothly than before.
If my theory is correct then the performance/fps decrease can be eliminated if the size of an rbx (realbot experience) file is decreased.
BTW, correct me if I'm wrong because it's just my opinion and observation.