If you have an app that needs to squeak every bit of kilobyte of memory out, I would try understanding how to use SQLite directly. You can access the C libraries that Apple provides in Swift as well as Objective-C. There is a wrapper that I know of by Stephen Sellis called SQLLites. And then there's one that's been started recently called GRDB which is essentially FMDB, but more Swiftie so to speak.

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