📣 📣 📣 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

Great!

How expensive is Coroutine stacktrace recovery? Is this the reason why it's only activated in debug mode?

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

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.

Is there an ETA for

1.1.0

(stable) ?

@Jonathan Depending on the feedback, most probably on Friday

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