Ruihan Li 9dc5a4d28f Box the large structure AnyUnboundSocket ...

So far it is quite common to put the `AnyUnboundSocket` in an enum
variant, e.g. the following code snippet.
```rust
enum Inner {
    Unbound(AlwaysSome<Box<AnyUnboundSocket>>),
    Bound(AlwaysSome<Arc<AnyBoundSocket>>),
    // ...
}
```

However, this pattern is very memory inefficient because the size
difference between two enum variants is significant. The size of
`AnyUnboundSocket` is much larger than the size of
`Arc<AnyBoundSocket>`, where the latter is simply a pointer and a
reference counter.

In fact, we're about to trigger Clippy's large_enum_variant warning.
We're just below its threshold, so the warning doesn't appear.

The solution is simple: If we put `AnyBoundSocket` in `Arc`, we should
also put `AnyUnboundSocket` in `Box`. This way the sizes of different
enum variants will be similar.

2023-12-26 06:51:25 +08:00

..

src

Box the large structure AnyUnboundSocket

2023-12-26 06:51:25 +08:00

Cargo.toml

Support virtio console device

2023-11-23 09:15:37 +08:00