Some questions about Archetype and chunk of Unreal Mass System.

[sheldonyancy]

Is the raw memory of all chunks under the same Archetype contiguous?

[Megafunk]

Currently by my reading they are allocated with a regular FMemory::Malloc for FMassArchetypeChunk but I am not 100% clear on if that's every path that creates these. FMassArchetypeData stores these in a TArray but each chunk has a pointer to its allocated data which it frees upon destruction

So each chunk is packed but separate chunks are going to be in different places. It is still useful to have distinct chunks because that is how mass spreads work across threads in parallelfor style, but I think it would be interesting to see if a single mega chunk would be better for processors that are not parallel.

You can manually configure the size of chunks that Mass creates in project settings if you want to make smaller or larger chunks as well but it's measured in bytes and not "make each chunk 20 entities" so it can change over time based on what archetypes have on them. (The sample archetypes are pretty small but a real project might have a lot more game data which would make more chunks)