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yoshuawuyts's profile
yosh
yosh
yosh
@yoshuawuyts

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yosh

@yoshuawuyts

Software researcher. he/they

Berlin, UTC+2
blog.yoshuawuyts.com
Joined May 2009

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    1. yosh‏ @yoshuawuyts Mar 14
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      Managed to get this working today: fully parallelized version of the Stream trait. Think Rayon but for @asyncrs. Started on this 6 months ago, had a breakthrough yesterday, and will probably publish later today.pic.twitter.com/aptQ5fpqmp

      rustdoc screenshot
      3 replies 9 retweets 87 likes
      Show this thread
    2. yosh‏ @yoshuawuyts Mar 14
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      Annnnd it's been published! Introducing parallel-stream — a data parallelism library for @asyncrs. Much like Rayon, but for async @rustlang streams instead of iterators. https://docs.rs/parallel-stream/1.0.1/parallel_stream/ …pic.twitter.com/E6Cb7pNkfL

      use parallel_stream::prelude::*;

#[async_std::main]
async fn main() {
    let v = vec![1, 2, 3, 4];
    let mut stream = v.into_par_stream().map(|n| async move { n * n });

    let mut out = vec![];
    while let Some(n) = stream.next().await {
        out.push(n);
    }
    out.sort();

    assert_eq!(out, vec![1usize, 4, 9, 16]);
}
      3 replies 21 retweets 99 likes
      Show this thread
    3. Christian Bourjau‏ @cbourjau Mar 14
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      Replying to @yoshuawuyts @asyncrs @rustlang

      Congratulations! On first sight, I am having some trouble understanding the difference to `buffered` and `buffer_unordered ` from the futures crate. Might be an idea to add a sentence to the readme? Or am I missing the obvious?

      1 reply 0 retweets 0 likes
    4. yosh‏ @yoshuawuyts Mar 14
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      Replying to @cbourjau @asyncrs @rustlang

      Hey, yes that's a good question. I go into the futures-rs concurrency paradigms (though didn't touch on buffer_unordered) in some detail in my post on streams concurrency: https://blog.yoshuawuyts.com/streams-concurrency/#concurrency-in-futures-rs … The short version is: futures-rs is not aware of executors, so uses max 1 thread.

      1 reply 0 retweets 2 likes
    5. yosh‏ @yoshuawuyts Mar 14
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      Replying to @yoshuawuyts @cbourjau and

      The other more obvious point is: the interface is quite different. buffer_unordered takes a stream of *Futures*. That's two layers of async, nested. parallel-stream on the contrary has a very familiar interface: it's the same as Iterator, ParallelIterator, and Stream.

      1 reply 0 retweets 0 likes
      yosh‏ @yoshuawuyts Mar 14
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      Replying to @yoshuawuyts @cbourjau and

      Following up on my first reply: I guess it's possible to create a stream of task::Spawn and then set a max concurrency through buffer_unordered, which provides much of the same functionality. I think the key distinction overall is ease of use. The easiest API is the one you know

      9:49 AM - 14 Mar 2020
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      • Christian Bourjau
      0 replies 0 retweets 1 like

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