Minecraft seriously slow and laggy

For many months now I have found my version of Minecraft to be very slow and laggy, playing in survival mode, this really disrupts gameplay. It is a constant issue but most noticeable when harvesting crops or trees, when operating minecart systems and when attacking hostile mobs. My game is up to date and I have tried playing offline to see if it was the internet, but this did not fix it, I also uninstalled and reinstalled Minecraft as some forums have suggested this may help but it still hasn't fixed it. Playing Minecraft PE on my iPad works a lot better, gives a much smoother playing experience and seems to work a whole lot better. This is very frustrating especially as I had to buy both versions separately.