Highest I've ever gotten was around 400 fps. Sadly, I didn't take a picture for it lasted for about 2 seconds only.....
mine used to be 5 fps but when for i got optifine i got 40 :D a big difference but not as big as the others....
300 fps when my computer is on for not that longbut how longer my computer is on how lower it gets btw when i record the fps is between 20 and 50