What are the performance differences between frozensets and sets in Python?

What are the performance differences between frozensets and sets in Python?

Frozensets are immutable, which makes them faster for membership tests and hashable, while sets are mutable and allow modifications.

Can you give me an example of when to use a frozenset instead of a set?

Use a frozenset when you need a constant collection of items, like keys in a dictionary, where immutability is required.

Are there any performance benchmarks comparing the two?

Yes, benchmarks show that frozensets can be faster for lookups due to their immutability, especially with large datasets.

What about memory usage? Do frozensets consume less memory?

Frozensets generally consume slightly less memory than sets because they don't need to store additional information for mutability.

Is there any downside to using frozensets?

The main downside is that you cannot modify a frozenset after creation, so if you need to change elements, a set is better.