For PostgreSQL jsonb one might mention the advantage of json(b)-indexing: it makes access of large json tables fast (rule of thumb: 100x faster - of course, it only matters for large datasets).

(see the PostgreSQL fine manual on JSON-indexing)

In reply to Re^2: Persistent data structures -- why so complicated? (updated) by erix
in thread Persistent data structures -- why so complicated? by davebaker

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