[ekidd]

I've been using async Rust in production for years. The learning curve is a little higher than I'd like. But it works great and it does everything we need it to. For an open source example, see https://www.dbcrossbar.org/

Many problems with async Rust involve people trying to get overly clever with lifetimes and zero-copy code. And if it's not either of those, it's people getting overly clever with async traits. So keep it simple!

Some tips:

1. Long-running async tasks should own their data, not borrow it. This will save you 80% of the pain right there.

2. Don't be afraid to allocate futures on the heap, and use "Box<dyn Future<Output=T>>" to hide the implementation.

3. If you must use traits with async members, use "async_trait".

4. Remember that futures can be cancelled at any "await" point. You can ignore this 99% of the time, as long as you use destructors to perform cleanup.

I would only recommend async Rust if you actually need very high-performance async code. Regular threaded Rust still works great for most things, as do languages like TypeScript. But if you actually need what async Rust offers, it's totally workable.