[scorpioxy]

I finished the book a few months ago, and yes that is the main reason.

I wanted to test the whole finished stack using only my components so I did run it using only what I built. It ran but was around 10x slower, mainly the graphics tests. I did optimise the performance of the basic drawing algorithms using faster ones but, naturally, it was still much slower than the java implementation.

Another advantage of using your built components is that it helped me uncover some bugs which I only noticed when you ran something as complex as the pong example.