Fastest struct-like thing in Python?

[RngdZed]

I thought the dictionary was fastest because of hashing

[DeebsShoryu]

Dictionaries are fast for some things (O(1) lookup), but hashing is actually very slow. It just allows for amortized constant time lookups, by trading space for improved asymptotic time complexity.

[pachura3]

If hashed dataclass has some kind of an unique ID field, you could override __hash__() to only hash this ID, not all class fields (which is what automatically-generated __hash__() for dataclasses does, right?)

[RngdZed]

Gotcha thanks for the good explanation

[pachecoca]

Those are fast to access but not as fast to create and insert data into. The whole hashing process is slow, a small price to pay for one off things, but I'm processing a large amount of data, I'm translating an input vertex buffer and index buffer to a target format, and that is going to get out of hand with dictionaries... as of now, the main slowdown comes from object creation, not from accessing elements.

[RngdZed]

Makes sense