zero-copy supports

[Future2100]

Is there possible to support zero-copy for the network socket?

[Darksonn]

Can you specify which copy you're asking if it is possible to avoid?

[Future2100]

@Darksonn I want a zero-copy(such as Linux API splice) between two sockets.
Here is a link reference: https://lwn.net/Articles/726917/

[Matthias247]

This isn't possible with the current set of APIs Tokio provides. These will copy all data to/from userspace buffers. Zero copy APIs are challenging, because they require the buffer to be alive for the whole duration of an async operation. However Rusts async tasks can be cancelled at any point in time.

There might be future support for this through io_uring APIs that people are thinking about, but this is currently only in the concept phase.