can anyone tell me if `File.writeBytes()` is async...

# announcements

[matt tighe]

can anyone tell me if File.writeBytes() is async?

[karelpeeters]

Depends on what you mean by async here.

[Hele]

When I check here I don't see that it is

[Hele]

https://github.com/JetBrains/kotlin/blob/44ecfb2fb8630560aac78422e9f053c1cdfbc158/libraries/stdlib/jvm/src/kotlin/io/FileReadWrite.kt#L84

[Hele]

but you can go further and check if the write method itself is async or not

[karelpeeters]

It's a native method.

[Hele]

From async, I believe he means if the code is processed on main thread or background thread

[karelpeeters]

Well there's probably buffering by the OS at least. But why does that matter?

[Hele]

Isn't he asking for that ?

[Hele]

What else async mean ?

[matt tighe]

i change permissions of the newly created file immediately after, so i’m worried it won’t be finished flushing the buffer

[karelpeeters]

You don't need to worry about that, all of that is handled at a way lower level.

[karelpeeters]

There should be no observable differences.

[matt tighe]

thanks