Suppose I have an arbitrary list of `suspend` func...

# coroutines

[v79]

Suppose I have an arbitrary list of suspend functions p(), q(),..., and I want them to run in parallel/concurrently. Is this a valid approach?

-.kt

[gildor]

yes, you can use launch (if you don’t need result of invocation)
This covered in official guide
https://github.com/Kotlin/kotlinx.coroutines/blob/master/docs/composing-suspending-functions.md#concurrent-using-async

[v79]

Thanks. This is all very new to me 🙂

[uli]

Why do you need the outer launch?

[v79]

Turns out I don't, it just appeared in the tutorial I was working from and I copied blindly 🙂. I've taken it out.

[Dico]

I don't think the code you wrote works. The launch invocations are using dispatcher provided by runBlocking scope, which uses the

[Dico]

Which queues the coroutines on the same thread

[Dico]

Instead, you can consider using GlobalScope, or even better, declaring your function as an extension on CoroutineScope interface. You can also put it in a component that has its own CoroutineScope.

[Dico]

Or just pass a dispatcher as context to the top most launch

[uli]

@Dico why do you think the code would not work on a single thread?

[uli]

If all coroutines are surrended must of the time a single thread will do just fine.

[Dico]

What I meant to say is that I think the code will run on a single thread (as I eloquently explained) while the poster explicitly wants to run tasks in parallel.

[Dico]

@uli