Right, it's the five times in a row thing that makes an in-memory solution faster. Otherwise, this is a purely sequential one-pass problem, which is how you'd do it in practice.
Parallelism with edge effects is pretty common. Weather simulation, finite element analysis, and big-world games all have that issue. The middle of each cell is local, but you have to talk to the neighbor cells a little.
Parallelism with edge effects is pretty common. Weather simulation, finite element analysis, and big-world games all have that issue. The middle of each cell is local, but you have to talk to the neighbor cells a little.