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kotlinlang

hi, I am new to ktor and kotlin in general. I am wondering what server engine I should be learning! should I be focusing on CIO or use netty?

I think you can start with tomcat :thinking_face:
In the website, they have an example about that <https://ktor.io/docs/server-engines.html#choose-create-server>

it probably won't matter until you get deep; there are more important things to learn.

Ktor is designed in such a way that you never need to interact with the underlying engine, except in advanced scenarios.

Just pick any engine and see how it works for you.  I tend to find Jetty the most reliable.  I believe CIO is a take on a next generation coroutine server for KMP, which you might consider somewhat experimental.

We use netty in production and it works very well