If you like cattrs, you _might_ be interested in trying out my msgspec library [1].
It works out-of-the-box with attrs objects (as well as its own faster `Struct` types), while being ~10-15x faster than cattrs for encoding/decoding/validating JSON. The hope is it's easy to integrate msgspec with other tools (like attrs!) rather than forcing the user to rewrite code to fit the new validation/serialization framework. It may not fit every use case, but if msgspec works for you it should be generally an order-of-magnitude faster than other Python options.
It works out-of-the-box with attrs objects (as well as its own faster `Struct` types), while being ~10-15x faster than cattrs for encoding/decoding/validating JSON. The hope is it's easy to integrate msgspec with other tools (like attrs!) rather than forcing the user to rewrite code to fit the new validation/serialization framework. It may not fit every use case, but if msgspec works for you it should be generally an order-of-magnitude faster than other Python options.
[1]: https://github.com/jcrist/msgspec
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