is there a coroutines implementation for general JVM apps, e.g. a desktop application?

Yes but for specific GUI frameworks. JavaFX, Swing, etc.

ouch

Then why are you using

Dispatchers.Main

?

That solved it, thank you! 😄

If your app starting point is the

main

function, you can just start it that way:

suspend fun main(): Unit = coroutineScope {
    // app starts here, launch coroutines and all
}

Might as well just use

runBlocking

, right?

suspend fun main

uses

Dispatchers.Default

in its

coroutineContext

, which is multi-threaded (at least 2 threads, configured for number of CPU cores), while

runBlocking

reuses the JVM single initial thread.

Reuse appeals to me. Also this can be done.

fun main() = runBlocking(Dispatchers.Default) {
    // stuff
}

@elizarov Does

suspend fun main

inject/reuse the JVM initial thread into

Dispatchers.Default

? If not, is it possible without major drawbacks?

The major drawback is that UI apps might also have suspend fun main

@louiscad suspend fun main can't use Dispatchers.Default because that's kotlinx

It'd be nice to have it configurable then.

I take that back, I'm pretty sure it's single thread event loop

I know

suspend fun main

does result in a multi-threaded coroutineContext regardless.