Function in_parallel_with_slice

pub fn in_parallel_with_slice<I, S, R, E>(
    input: &mut [I],
    thread_limit: Option<usize>,
    new_thread_state: impl FnMut(usize) -> S + Send + Clone,
    consume: impl FnMut(&mut I, &mut S) -> Result<(), E> + Send + Clone,
    periodic: impl FnMut() -> Option<Duration> + Send,
    state_to_rval: impl FnOnce(S) -> R + Send + Clone,
) -> Result<Vec<R>, E>
where
    I: Send,
    E: Send,
    R: Send,

Available on crate feature parallel only.

An experiment to have fine-grained per-item parallelization with built-in aggregation via thread state. This is only good for operations where near-random access isn’t detrimental, so it’s not usually great for file-io as it won’t make use of sorted inputs well. Note that periodic is not guaranteed to be called in case other threads come up first and finish too fast.