These are all super concrete things that are coming down. Some of the less concrete things I'd love to hope see eventually (in some form): #[parallel] attributes for parallel (async) iterators, such as crossbeam. `async fn main` to make async work from anywhere.
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(Where did you hear the former is happening?)
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At RustFest. Was hanging out with two people working on PRs to do both those things! If they'll get accepted is a different thing entirely. But given the perf improvements they were seeing (4x faster on average) there's good reasons why this would be desirable hehe.
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links, since I didn't know: https://docs.rs/hashbrown/0.1.0/hashbrown/struct.HashMap.html … simd "quadratic probing" hashmap lib and https://github.com/Amanieu/parking_lot … mutex locking &c lib.
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