So, I have this friend and his computer crashed. Now he uses his Grandma's computer. But he plays Minecraft but my friend's Grandma doesn't have Java so he can't play Minecraft. He asked his Grandma if she could install Java, but she said no. She thinks that any program slows down her computer. I don't think that any program (even Java) slows down her computer but I need to make sure that Java doesn't slow down her computer and I need evidence it doesn't slow down her computer.