Struct PQConfig 

pub struct PQConfig {
    pub dim: usize,
    pub num_subspaces: usize,
    pub dims_per_block: usize,
    pub num_centroids: usize,
    pub seed: u64,
    pub use_opq: bool,
    pub opq_iters: usize,
}

Configuration for residual Product Quantization with OPQ.

Fields

dim: usize

Vector dimension

num_subspaces: usize

Number of subspaces (M) - computed from dim / dims_per_block

dims_per_block: usize

Dimensions per subspace block.

num_centroids: usize

Number of centroids per subspace (K) - typically 256 for u8 codes

seed: u64

Random seed for reproducibility

use_opq: bool

Use OPQ rotation matrix (learned via SVD)

opq_iters: usize

Number of OPQ iterations

Implementations

impl PQConfig

pub fn new(dim: usize) -> Self

Production profile: at most one byte per eight dimensions (96 bytes for 768D), with OPQ training. Raw vectors remain available for the bounded exact rerank stage.

pub fn subspace_dim(&self) -> usize

Dimension of each subspace

Trait Implementations

impl Clone for PQConfig

fn clone(&self) -> PQConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PQConfig

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PQConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PQConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.