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A comment on Async and Await in Rust: a full proposal. Parent comment

Re:Async and Await in Rust: a full proposal by drb91 on Sunday July 15, 2018 @03:29PM (#17536624)
Async being a “default” function type doesn’t make much sense unless you’re doing io. If you’re just computing, you often can’t proceed without the result and want to proceed as soon as you have the result—i.e. blocking. Both are critical to getting good performance.

I’m curious if discerning which is the best type is possible to tool automatically with static or tracing analysis.

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Re:Async and Await in Rust: a full proposal by gpderetta on Sunday July 15, 2018 @04:33PM (#17536924)
Generators, a-la python for example, are completely equivalent to async functions and have nothing to do with IO.
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Re:Async and Await in Rust: a full proposal by drb91 on Sunday July 15, 2018 @05:14PM (#17537119)
True! However, I believe rust has a separate, distinct yield/generator functionality coming that should address those needs separately. I think off-hand it’d be pretty easy to wrap them in a stream, or to join a stream into a generator, if you did want to compose them.
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Re:Async and Await in Rust: a full proposal by steveklabnik on Sunday July 15, 2018 @05:16PM (#17537125)
That’s correct; async/await uses Generators under the hood, but we haven’t stabilized them yet. It’s the plan to though!
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