miniblog.

Over a sufficiently long time horizon, all code you write is legacy code.

It's really satisfying to use a profiler for the first time on a project. I always find a big performance win with only a small code change. It's never the code that I expected to be slow, however!

One interesting aspect of collecting coins in a platformer like mario: it makes the level stateful. You can see if you've been somewhere before based on whether there are coins present.