It champions #TonyHoare's #CSP model of concurrency which takes me back. Back to the time I failed to get funding for a start-up to build an #Occam compiler targeting i386. Which was largely a ploy to get the UK government to buy me some neat kit 🤷♂️
Also, although GC isn't necessarily any slower than heap allocation, heap allocation is slow, and most other languages allocate all of their futures on the heap. #Rust is one of very few languages with unboxed futures.
Is that worth the complexity? I dunno. But it should be kept in mind when discussing async Rust, at any rate.
GC isn't a silver bullet either, I should note. It has the rather serious problem that it doesn't free non-memory resources (e.g. file handles) in a timely fashion, so you still need some other mechanism to do so, like Java's try-with-resources.
And although GC isn't necessarily any slower than heap allocation, heap allocation is slow, and most other languages with async box all of their futures. Which, again, is slow. #Rust is one of very few languages with unboxed futures.
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