python3-msgspec 0.18.6-1 (amd64 binary) in ubuntu oracular

 A fast serialization and validation library, with builtin support for JSON,
 MessagePack, YAML, and TOML.
 .
  * High performance encoders/decoders for common protocols. The JSON and
    MessagePack implementations regularly benchmark as the fastest options for
    Python.
  * Support for a wide variety of Python types. Additional types may be
    supported through extensions.
  * Zero-cost schema validation using familiar Python type annotations. In
    benchmarks msgspec decodes and validates JSON faster than orjson can decode
    it alone.
  * A speedy Struct type for representing structured data. If you already use
    dataclasses or attrs, structs should feel familiar. However, they're 5-60x
    faster for common operations.
 .
 All of this is included in a lightweight library with no required
 dependencies.