Enum Parallelism 

pub enum Parallelism {
    Serial,
    Auto,
    Threads(usize),
}

CPU scheduling preference.

Variants

Serial

One worker.

Auto

Backend chooses from available parallelism and workload size.

Threads(usize)

Upper bound on worker count. Zero is rejected by the builder.

Implementations

impl Parallelism

pub fn worker_bound(self) -> usize

Most worker threads this preference lets an operation run on.

What ScratchRequirement::fits_budget charges a per-worker scratch term against. Serial is one worker and Threads(n) is n. Auto is the machine’s available parallelism, the width of a default thread pool, or 1 when it cannot be determined (the same fallback such a pool uses). A provider that runs on a wider pool than this must check its budget against the width it actually runs on.

Trait Implementations

impl Clone for Parallelism

fn clone(&self) -> Parallelism

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Parallelism

impl Debug for Parallelism

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Eq for Parallelism

impl Hash for Parallelism

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Parallelism

fn eq(&self, other: &Parallelism) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Parallelism