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Hi guys, let me ask you a simple question.

When using co-routines, will we be using all cpus available always?

Maybe girls could reply too, all *folks* in fact. Read the documentation of `Dispatchers` and its members (Main, Default and IO), that will answer your question.

It depends on the `CoroutineDispatcher` you're using:
- `Dispatchers.Default` uses a pool of threads having at most 1 thread per CPU core
- `<http://Dispatchers.IO|Dispatchers.IO>` uses up to 64 threads
- `Dispatchers.Main` has only one thread
- When not specifying a dispatcher, it inherits the parent scope's
I Hope I correctly understood the question !

<@U3ZLHBTLG>, about `guys`, I’ve asked my personal English teach that is from England and he said to me that `guys` is completely generic. Not referring to males. In his words

```
I disagree with him. Guys is totally generic. You can even call a group of only women, "guys"
```

<@UFQKL22HE>, interesting, I didn’t know that. I’ll be reading the Dispatchers section as <@U3ZLHBTLG> said, but have we an option that we could use as many threads as needed in all cpu cores if we want?

you can create your own dispatcher <https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/new-fixed-thread-pool-context.html>

<@U799XQL8J> I think that what best suits your needs is `Dispatchers.Default`.

<@U799XQL8J> About "guys" and your teacher, did you ever saw the following sentence? "She is a nice guy"
Just search on the web and in dictionaries for that :wink:

using `guys` is grammatically correct, but it’s also androcentric as hell

<https://en.wikipedia.org/wiki/Androcentrism#Generic_male_language>