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

# coroutines

[David Glasser]

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) {?

[David Glasser]

or are we just supposed to be using suspend fun main() now?

[octylFractal]

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

[David Glasser]

so do most people use fun main = runBlocking(Dispatchers.Default)?

[octylFractal]

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

[David Glasser]

yeah this is for server

[marstran]

I think you can do this:

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

[Ran Magen]

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

[octylFractal]

is main() inside a class Temp { } declaration? if not, TempKt is the correct class name

[Ran Magen]

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?

[octylFractal]

yes. that's correct

[octylFractal]

https://pl.kotl.in/1ojIYU-ty