Function in_parallel

pub fn in_parallel<I, S, O, R>(
    input: impl Iterator<Item = I> + Send,
    thread_limit: Option<usize>,
    new_thread_state: impl FnOnce(usize) -> S + Send + Clone,
    consume: impl FnMut(I, &mut S) -> O + Send + Clone,
    reducer: R,
) -> Result<<R as Reduce>::Output, <R as Reduce>::Error>
where
    R: Reduce<Input = O>,
    I: Send,
    O: Send,

Available on crate feature parallel only.

Read items from input and consume them in multiple threads, whose output output is collected by a reducer. Its task is to aggregate these outputs into the final result returned by this function with the benefit of not having to be thread-safe.

• if thread_limit is Some, the given amount of threads will be used. If None, all logical cores will be used.
• new_thread_state(thread_number) -> State produces thread-local state once per thread to be based to consume
• consume(Item, &mut State) -> Output produces an output given an input obtained by input along with mutable state initially created by new_thread_state(…).
• For reducer, see the Reduce trait