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If you take out ordering, then lookups on your SoA are now a search, and n-field lookup on an entity is now a JOIN operation.

The smarter you get about it, the closer you get to an OLAP db

Which leads to my theory… I feel like Bevy could be implemented on top of an in-memory DuckDB and get away with it

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Depending on your access patterns, maybe you could have a hash table mapping entities ids to indexes in your SoA. Perhaps that's viable if looking up a single entity is not typical to your use case?

> Which leads to my theory… I feel like Bevy could be implemented on top of an in-memory DuckDB and get away with it

Haha, it certainly does sound viable.

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