On: JSONlite – A self-contained, serverless, zero-configuration, JSON document store

[s_kilk]

Just guessing, but it looks like jsonlite relies on the uniqueness property of UUIDs to 'guarantee' uniqueness in what amounts to it's primary-key index, the index of ids.

User-defined keys would need to be checked against all existing keys before inserting, to ensure uniqueness. Not impossible, but potentially much slower.

[nodesocket → s_kilk]

Correct, this all works, because we assume the UUID is globally unique, thus a read is a O(1) operation.