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What's the state of `<http://Dispatchers.IO|Dispatchers.IO>`? I'm seeing different behavior to the documentation, and some scheduling weirdness

For instance, the docs state that they use the same threads as the default dispatcher, but right now that's still the fork/join pool?

And when I do use it, I get ~30 threads burning a bunch of CPU in `Thread.yield()`

```CoroutineScheduler-worker-24  Runnable CPU usage on sample: 16ms```

@ `kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.cpuWorkerIdle() CoroutineScheduler.kt:781`

I'd only launched 8 coroutines in this case, I needed to constraint to a relatively small number of concurrent connections

Just use fan out structure like in the guide (or on Roman's KotlinConf 18 speech)

There were some bugs in the past and there were some changes recently. 0.30.2 should be good tho

<@U2E974ELT> In 0.30.0 there are still bugs? I'm about to release an android app to production, using it, I can't wait till 1.0.0 and kotlin 1.3, and as far as I understood there's still open issues with gradle 4.10.2 metadata and proguard in 0.30.2, is it safe to use 0.30.0?

Or is there a way to overcome the gradle and proguard issues?

This app has alot of devices depending on it... I can't really take chances...

Both gradle and proguard issues have workarounds. You can wait a bit for 1.0.0-rc release that has them solved tho. 

1.0.0 rc is without kotlin 1.3? I can't wait for more than today or  maximum sunday..

And I can't use kotlon 1.3 beta for it either...

0.30.2 is better than 0.30.0 and has its dispatcher bugs fixed

What about the issues? I need proguard, and android studio 3.2 requires grdle over 4.7?

Would it be possible to have 0.30.3 just for these issues?

You don’t enable experimental Gradle Metadata then it works with any version

ProGuard issues only manifest if you use AndroidX and you can easily workaround with rules. 

I thought I upgraded, but maybe not - I'll double check. Thanks for the assist!

Oh yeah, I was way back on `0.26.1-eap13`