Enables controlled spawning of non-'static futures when
using the async-std or
tokio executors.
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
in parallel. This can be seen when benchmarking a reasonable
number (> ~1K) of I/O futures, or a few CPU heavy futures.
The API is meant to be a minimal wrapper around efficient
executors. Users may use "use-async-std", or the
"use-tokio" features, to obtain a specific global executor implementation.
These features provide TokioScope and AsyncScope that
support spawning, and blocking.
However, none of those features are necessary -
you may freely implement your own executor. See
docs.rs for detailed
documentation.
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.