Function git_repository::parallel::in_parallel_with_slice

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

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 detremental, 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.