ContentConverter for Protobuf

[YuriDenison]

Currently only JSON converters supported out of the box (Gson, Jackson) It would be nice to have Protobuf converter to be able to use (kotlin + retrofit + protobuf) on android client side and (ktor + protobuf) on server side.

It is quite common use case to migrate from Json to Protobuf in mobile projects in case of large amount of small objects passing to requests/responses. The reasons are simple - improved parsing performance, lower CPU usage than gson/jackson, fixed protocol, api versioning etc.

On Android client side Retrofit supported Proto converter more than a year ago - https://github.com/square/retrofit/blob/master/retrofit-converters/protobuf/src/main/java/retrofit2/converter/protobuf/ProtoConverterFactory.java

[hartmut-co-uk]

+1 ideally via https://github.com/Kotlin/kotlinx.serialization ..?!

[oleg-larshin]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.