Hello, http clients that utilize

java NIO

already have asynchronous nature for example Jetty Http Client, asynchttpclient, apache async http client, and etc is it necessary to wrap it with coroutines to do parallel http call ?

is it will improve / reduce the performance of http client itself ?

Although those clients use non-blocking apis, the methods are still synchronous and suspend the running coroutine. You will need multiple coroutines to run multiple requests in parallel.

I see, thanks for the insight~

if they have a callback you can convert them to suspendable functions using suspendCancellableCoroutine { cont -> blahh // oncallback { cont.resume and so on

Or Cahnnels, or CompletableDeferred. It won't improve performance. But it will make your code easier to read.