How can I create a single threaded Dispatcher on K...

# coroutines

[darkmoon_uk]

How can I create a single threaded Dispatcher on Kotlin Native for iOS (that isn't the Main Dispatcher)?

I want to keep business logic off the Main thread but also not worry about state being frozen between threads, which is a pitfall when using the Default Dispatcher (on a multi core device). A two-threaded delineation between UI/business logic seems like a more manageable, pragmatic middle ground for KMM projects until the new Native Memory model changes the landscape.

[Michal Klimczak]

When you use coroutines-native-mt this is exactly what you get. Dispatchers.Default performs work on a single background thread on ios

[darkmoon_uk]

@Michal Klimczak Can you cite this? My understanding of Dispatchers.Default is that it typically uses a Thread count equal to the number of hardware cores available on the platform. I know this isn't a guarantee, but neither have I seen it stated anywhere that the Default Dispatcher of coroutines-native-mt is Single threaded.

[Michal Klimczak]

Yep

[Michal Klimczak]

https://github.com/Kotlin/kotlinx.coroutines/blob/native-mt/kotlin-native-sharing.md

[Michal Klimczak]

You are right a out this dispatcher on jvm, but on native it works differently

[darkmoon_uk]

Thanks so much @Michal Klimczak, this is a whole page of important documentation I'd missed on Native Coroutines; going to absorb 👍

[Michal Klimczak]

Had the same problem earlier, the docs on new stuff is everywhere and sometimes it's hard to find it