Excessive lag

Everything has slowed to a crawl, when you break a block it goes into the air and slowly floats down to the ground, you strike a mob that mob also goes to the air and slowly floats down, you go to eat something takes approximately a minute or so to get your food meter back up, fishing? You guessed it same thing takes forever to fish, the game was great til this last update came out , I'm about to just Uninstall the game and find another game to play