Recently I have been noticing that my laptop's speed has decreased after installing Ubuntu. I am on a MacBook Pro and I have 4.2GHz and 4GB of RAM. I used to play games like Minecraft before on it and they ran fine with 60 FPS. But now that I am in Ubuntu, things don't go as fast as they used to.
I made Minecraft run with 3GB of RAM and I installed Optifine, but it is still slow! I don't know what to do anymore!