I often get lag on my server on my usual computer, and I assumed it was natural. However, I'm using a different computer for the weekend, and I decided to start up a server. There was no lag at all. In fact, it ran quicker with about 10k bricks on it than my usual computer does with no bricks on it. I really want to make Blockland on my usual computer run like it does on this one, so what would I need to check to get it to run faster?