Enum CentroidCompression 

pub enum CentroidCompression {
    Fp32,
    Fp16,
    Int8,
    PQ {
        n_subquantizers: usize,
        n_bits: u8,
    },
    OPQ {
        n_subquantizers: usize,
        n_bits: u8,
    },
}

Compression method for centroids

Variants

Fp32

Full FP32 precision (baseline)

Fp16

FP16 half precision (2x compression)

Int8

Int8 quantization (4x compression)

PQ

Product Quantization (high compression for high-dim)

Fields

n_subquantizers: usize

n_bits: u8

OPQ

OPQ + PQ (optimized rotation before PQ)

Fields

n_subquantizers: usize

n_bits: u8

Implementations

impl CentroidCompression

pub fn bytes_per_centroid(&self, dim: usize) -> usize

Compute bytes per centroid for this compression

pub fn fits_in_cache( &self, n_centroids: usize, dim: usize, cache_bytes: usize, ) -> bool

Check if this compression will fit in given cache size

pub fn recommend(n_centroids: usize, dim: usize, cache_bytes: usize) -> Self

Recommend compression level based on constraints

Trait Implementations

impl Clone for CentroidCompression

fn clone(&self) -> CentroidCompression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CentroidCompression

impl Debug for CentroidCompression

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

Formats the value using the given formatter.

impl Eq for CentroidCompression

impl PartialEq for CentroidCompression

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for CentroidCompression