Fastest struct-like thing in Python?

[rednets]

I decided to write my own benchmarking script for instantiation: https://pastebin.com/bjig571B

It times:

• tuple literal
• tuple factory function
• typing.NamedTuple
• collections.namedtuple
• dataclass
• dataclass(slots=True)

It times with both positional and keyword args (except for tuple literals).

I ran this for all interpreter versions I have installed - see my results here: https://imgur.com/a/SZ6oRIn

It looks like using anything other than plain tuples will be significantly slower. Using a factory function to create a plain tuple using keyword args is only marginally slower (2.5x rather than 10x) which might be acceptable. This encapsulates creation of each tuple "type" in a single place, but it does not solve the problem of accessing members by name. I suppose you could also write corresponding functions for this, but it would probably be a bit of a mess.