#async #async-std #tokio #scoped #spawn

async-scoped

Spawn scoped (non ’static) asynchronous futures for async_std and tokio runtimes

10 unstable releases (4 breaking)

0.7.0 Jul 7, 2021
0.6.1 Feb 14, 2021
0.6.0 Jan 2, 2021
0.5.1 Nov 16, 2020
0.2.0 Dec 22, 2019

#128 in Asynchronous

Download history 59/week @ 2021-06-30 73/week @ 2021-07-07 84/week @ 2021-07-14 69/week @ 2021-07-21 74/week @ 2021-07-28 46/week @ 2021-08-04 32/week @ 2021-08-11 12/week @ 2021-08-18 11/week @ 2021-08-25 71/week @ 2021-09-01 18/week @ 2021-09-08 23/week @ 2021-09-15 22/week @ 2021-09-22 4/week @ 2021-09-29 30/week @ 2021-10-06 28/week @ 2021-10-13

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Used in 3 crates

Apache-2.0/MIT

31KB
485 lines

Async-scoped

Enables controlled spawning of non-'static futures when using the async-std or tokio executors.

Motivation

Present executors (such as async-std, tokio, etc.) all support spawning 'static futures onto a thread-pool. However, they do not support spawning futures with lifetime smaller than 'static.

While the future combinators such as for_each_concurrent offer concurrency, they are bundled as a single Task structure by the executor, and hence are not driven parallelly. This can be seen when benchmarking a reasonable number (> ~1K) of I/O futures, or a few CPU heavy futures.

Usage

The API is meant to be a minimal wrapper around efficient executors. Users must use either "use-async-std", or the "use-tokio" feature gates, to obtain a usable scope type. These gates provide TokioScope and AsyncScope that support spawning, and blocking. See docs.rs for detailed documentation.

License

Licensed under either of Apache License, Version 2.0 or MIT license at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this crate by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

Dependencies

~1.2–3.5MB
~71K SLoC