Struct WorkGroupConfig 

pub struct WorkGroupConfig {
    pub preferred_size: usize,
    pub max_size: usize,
    pub min_size: usize,
}

Configuration for choosing optimal work group sizes.

Models GPU-like work group sizing where the total work is divided into groups of a fixed size, potentially with padding in the last group.

Fields

preferred_size: usize

Preferred work group size (e.g. 64, 128, 256).

max_size: usize

Maximum work group size supported.

min_size: usize

Minimum work group size (avoid groups too small for efficiency).

Implementations

impl WorkGroupConfig

pub fn new(preferred_size: usize) -> Self

Create a new config with preferred group size.

pub fn cpu_default() -> Self

Create a default config suitable for CPU-side Rayon parallelism.

pub fn optimal_size(&self, total: usize) -> usize

Compute the optimal work group size for total items.

Returns a size in \[min_size, max_size\] that balances occupancy. Prefers preferred_size but adjusts if total is small.

pub fn num_groups(&self, total: usize) -> usize

Compute the number of work groups needed for total items.

pub fn group_ranges(&self, total: usize) -> Vec<Range<usize>>

Return ranges for each work group covering 0..total.