:mega: :mega: :mega: I am happy to announce `kotli...

# coroutines

[Vsevolod Tolstopyatov [JB]]

📣 📣 📣 I am happy to announce kotlinx.coroutines 1.1.0-alpha!
This is a major release with two new modules, a lot of improvements in testability and debuggability, various performance improvements and bug fixes.

Changelog:
* kotlinx-coroutines-test module with testable Dispatchers.Main
* kotlinx-coroutines-debug module with debug agent to track and debug active coroutines
* Stacktrace recovery mechanism that provides additional coroutine-based stacktraces in exceptions (enabled in debug mode)
* MainScope and CoroutineScope.cancel methods for simpler integration with structured concurrency
* CancellableContinuation race between resumeWithException and cancel is now not treated as an uncaught exception
* Dispatchers.Default CPU consumption in idle state is reduced
* JavaFx dispatcher initialization bug fixed

Full changelog: https://github.com/Kotlin/kotlinx.coroutines/releases/tag/1.1.0-alpha

[uliluckas]

Great!

[uliluckas]

Is there any link with further informatin regarding "Kotlin/Native single-threaded workers support"?

[danny]

Likely the cost of creating a Throwable and filling the stacktrace, and that can get pretty CPU intensive under heavy load

[Vsevolod Tolstopyatov [JB]]

Likely the cost of creating a Throwable and filling the stacktrace

More or less this.

How expensive is Coroutine stacktrace recovery?

Taking into account the fact that exception is already thrown, cost is not that large.

Is this the reason why it’s only activated in debug mode?

It is debug facility 🙂 Maybe it will be enabled by default at some point, depending on the feedback.

[Vsevolod Tolstopyatov [JB]]

“Kotlin/Native single-threaded workers support”

Previously it was impossible to use kx.coroutines from K/N workers, only from the main thread. Now kx.coroutines can be used from workers as well

[Jonathan]

Is there an ETA for 1.1.0 (stable) ?

[Vsevolod Tolstopyatov [JB]]

@Jonathan Depending on the feedback, most probably on Friday

[Icaro Temponi]

think i'll use this one in production right now, YOLO 😁