Hmm. So I was under the impression that the "normal" way to make a program that uses coroutine was

fun main() = runBlocking {

We just discovered that this leads to coroutines being run single-threaded by default, not in Dispatchers.Default. This is a big surprise! Is the normal pattern supposed to be

fun main() = runBlocking(Dispatchers.Default) {

?

yes, by default

runBlocking

is an event loop that runs on the thread that called it.

suspend fun main()

is just shorthand for using

runBlocking

iirc

so do most people use

fun main = runBlocking(Dispatchers.Default)

?

personally I typically don't have coroutines at the top level, so I end up with my own application

CoroutineScope

that I `launch`/etc. off of

yeah this is for server

I think you can do this:

suspend fun main() = coroutineScope { ... }

that throws

Error: Main method not found in class Temp, please define the main method as:
   public static void main(String[] args)
or a JavaFX application class must extend javafx.application.Application

is

main()

inside a

class Temp { }

declaration? if not,

TempKt

is the correct class name

I'm pressing the little play button in Intellij, so it's choosing the parameters.. Are you saying

suspend fun main(args: Array<String>) = coroutineScope { .. }

should work as a main function?

yes. that's correct