What xlsior said. A dual core/CPU/HT system is not currently going to give you a performance boost in BlitzMAX, and I wager in Windows application at all for as long as it's using the same horrible half-assed threading model it's been using since the dawn of time, and which was a bad idea, even then.
It'll be interesting to see if Longhorn provides a better threading / process model.
It'll be interesting to see if Longhorn provides a better threading / process model.