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What are the differences between HttpClient(CIO) and HttpClient(OkHttp)  with regards to ktor-client  not server?  Thanks

I always use`CIO` and if when i find that it acts strange I use `Java` instead. usually it then acts the same, and i i find the bug and go back to CIO

The difference is in the underlying implementation. The CIO engine is written by the Ktor team and the OkHttp engine uses the <https://square.github.io/okhttp/|OkHttp> HTTP client.

Alesksei, thanks can you elaborate on what one might experience as a difference between them? say performance or json serialization?  Thanks again

The CIO engine uses coroutines and easier to debug than other engines. It's recommended for the development usage only. The benefit of the OkHttp engine is that it works on Android 2.3 and above.