Yeah, you are right. Fury supports polymorphism and circular/shared references, which are not supported by json/jackson. I did a benchmark with jackson before, here are the results: 1) Fury is 41.6x faster than jackson for Struct serialization 2) Fury is 65.6x faster than jackson for Struct deserialization 3) Fury is 9.4x faster than jackson for MediaContent serialization 4) Fury is 9.6x faster than jackson for MediaContent deserialization

see https://github.com/chaokunyang/fury-benchmarks for detailed benchmark code.