Use just one list with a flag in the particle to see whether the particle is alive or dead, saves swapping between lists and you can use a simple array for fast access.
Yes, simplicity, that's a good idea :) I was just wondering how much time would be saved if just iterating over the active particles instead of everything every time (say a system of 10000 particles). Maybe that's relevant, maybe not.
If relevant, doubly-linked might work better? dcollections LinkList, or maybe DList? I'm asking mostly because I'd like the container to avoid memory allocations while in use.
