[mau]

Congratulations to the team, Pydantic is an amazing library.

If you find JSON serialization/deserialization a bottleneck, another interesting library (with much less features) for Python is msgspec: https://github.com/jcrist/msgspec

[jammycrisp]

Are there any necessary features that you've found missing in msgspec?

One of the design goals for msgspec (besides much higher performance) was simpler usage. Fewer concepts to wrap your head around, fewer config options to learn about. I personally find pydantic's kitchen sink approach means sometimes I have a hard time understanding what a model will do with a given json structure. IMO the serialization/validation part of your code shouldn't be the most complicated part.

[BerislavLopac]

The biggest issue missing from most conversion and validation libraries is creating models from JSON Schema. JS is ideal for central, platform agnostic single source of truth for data structures.

[timinou]

In my use case, I find the lack of features of msgspec more freeing in the long run. Pydantic is good for prototyping, but with msgspec I can build nimble domain specific interfaces with fast serial/deserialisation without having to fight the library. YMMV!