`tokio::fs::write` clones the data

[oriongonza]

I get that it's supposed to be a 1 <-> 1 with std::fs::write but it copies whatever you give it and it doesn't even tell you about it until you look at the source code.

A better interface might be something like AsRef<[u8]> + Send + 'static so that you can pass owned data like Vec<u8>, Arc<[u8]>, bytes::Bytes...

However this is a breaking change as &[u8] could no longer be sent.

So either a new API for this or comment clearly that this will clone the data.

[Darksonn]

I've looked into this before, and it cannot be fixed, unfortunately.

Happy to see additional docs about this.

[oriongonza]

What about adding another function and deprecating this?

[paolobarbolini]

I may have found a solution in #7199