jsoniter-scala VS json4s

Afaik dsl-json came up with a lot of improvements and inspired a several other libraries like JsonIter and jsonIter-scala. Jsoniter-scala by u/plokhotnyuk is probably the most optimized JSON library on the JVM at this point, and seems to power most of the Scala ecosystem. Some implementations/optimizations eventually made their way back into Jackson and other libraries.

I was on your place more then 5 years ago, when cut the 1st release of jsoniter-scala.

We have our own open-source code-generator that produces Scala code from Smithy. The code module is entirely dependency-free, and the generated code is not biased towards any library, be that http or json. We do however have out-of-the-box integration with jsoniter and http4s.

You can use jsoniter-scala. It is easy to use like upickle.

BEWARE: uJson is vulnerable under DoS attacks

Please see sources (and GitHub history of development) of jsoniter-scala as an example in the domain of JSON parsing and serialization.

I suggest looking into jsoniter-scala Macro API it has unique support of both Scala 2 and Scala 3 in a source compatible manner.

Since v2.13.6 release jsoniter-scala dropped support of Java 8: https://github.com/plokhotnyuk/jsoniter-scala/releases/tag/v2.13.6

SWAR (SIMD in register) techniques were used in the last release of jsoniter-scala to speed up parsing and serialization on JVM platforms.

Try jsoniter-scala. It is a library with macros for handy deriving of safe and efficient JSON codecs that has Scala 3 support since v2.12.1

In Scala we have Jackson, Json4s, Circe. Your api is incredibly similar to Json4s's one.