Currently, coroutines are supported only for main thread. So, http call with coroutines does not blo...

# kotlin-native

[yuya_horita]

Currently, coroutines are supported only for main thread.
So, http call with coroutines does not block main thread. But, in iOS, main queue (which manages main thread) is a serial queue.
This means one processing will be performed after other processing queued previously have done.

This is a problem in case of these.
- calling many http requesting at once. (should be done concurrently.)
- calling http request after heavy processing like image processing.

[olonho]

did you check https://github.com/JetBrains/kotlin-native/blob/f68f7028b10ce6f8cd195faaee2c78fd8432ddf1/samples/objc/src/objcMain/kotlin/Window.kt#L124?

[yuya_horita]

No, but it seems request is performed in main queue, too.
It means processing are performed in serial.

<https://github.com/JetBrains/kotlin-native/blob/f68f7028b10ce6f8cd195faaee2c78fd8432ddf1/samples/objc/src/objcMain/kotlin/Window.kt#L150>

[olonho]

sure not, first lambda parsing JSON is executed in async queue, only second one one which sets UI element is executed in UI thread

[yuya_horita]

Oh, sorry 🙏

[yuya_horita]

I forgot to tell you.
I’m using ktor and I want to share ktor http client codes.
But, It uses coroutines worked only with main thread.

[yuya_horita]

so, <https://kotlinlang.slack.com/archives/C3SGXARS6/p1542767647494700>

[olonho]

yeah, making ktor to use async queues is planned, but not done yet. But we’re working on it.

[yuya_horita]

Very nice 👍
I’m looking forward to it