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Yes you can do this with most scripting languages. This is why I consider Redis more a DSL, proof is, it is trivial to write a Redis-complete script using a real scripting language.

However the problem with this approach is that you get a lot less performances and memory efficiency.

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Redis is i/o bound, while this approach eliminates i/o and copying data from Redis to the client ;)

Not sure about memory efficiency. You can use __slots__ in Python or custom data structures (e.g. blist) if you have specific needs.

If you don't have a network interface, is not the same thing as Redis. Even Redis can be written as a C library, but it's not the same. Redis is all about a shared persistent state.

I've no idea about __slots__, just a feeling that there are too much underscores to work well ;) But in general to get as memory efficient as Redis in a scripting language is very hard for different (good) reasons.

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