I actually have't heard of any - and I'm pretty deep into the async things. Rusts async model just follows the synchronous model. Everything is not thread-safe

I actually have't heard of any - and I'm pretty deep into the async things. Rusts async model just follows the synchronous model. Everything is not thread-safe unless it's annotated with the `Send` or `Sync` annotation. Futures which can be awaited are either not thread-safe - which means they can only be executed by a single threaded executor. If they are `Send` they can be migrated between threads and also executed by a multithreaded executor - like tokio. But those are rather just thread-safety annotations and not a memory-model