Exactly, and messages are divided into buckets which contain only one kind of (type of message, type of receiver)-combination. If you then iterate over that, yo

Exactly, and messages are divided into buckets which contain only one kind of (type of message, type of receiver)-combination. If you then iterate over that, you are going to execute very similar code repetitively. I guess my epiphany was that exactly because actors are isolated, I could manage them like this and do some very primitive fast array iteration, while still using a nice high-level pattern to implement the actual game logic.