[azinman2]

What are you using? Have you tried NSJSONSerialization? It’s quite fast (am very curious how it shows in these benchmarks), but I don’t think it does the fancy Codable stuff.

[jeremy_wiebe]

You might want to check out the benchmark I wrote to compare exactly that.

https://github.com/jeremywiebe/json-performance

[eridius]

Swift has JSONEncoder and JSONDecoder types to do Codable, though internally they have to encode to/decode from the Foundation objects that JSONSerialization produces.