Enum CompressionPolicy 

pub enum CompressionPolicy {
    Compress,
    Passthrough,
    Fp16,
}

Determines how vectors are stored in a Corpus.

The policy is set at construction and cannot be changed after the first insert call.

Variants

Compress

Full codec pipeline: rotate → scalar quantize → optional FP16 residual.

Requires a trained Codebook and a CodecConfig. Produces StorageTag::U8 output.

Passthrough

Store raw f32 bytes with no transformation (1× compression ratio).

The four bytes of each f32 are stored in little-endian order inside the indices field of a CompressedVector. Produces StorageTag::F32 output.

Fp16

Cast each f32 to a 16-bit float and store 2 bytes per dimension in little-endian order (2× compression ratio).

Precision loss is bounded by the f16 range; max |error| is typically below 1e-2 for normalised embedding values. Produces StorageTag::F16 output.

Implementations

impl CompressionPolicy

pub const fn requires_codec(&self) -> bool

Returns true for policies that run the full codec pipeline.

Only CompressionPolicy::Compress requires a trained codebook; the other policies bypass the codec entirely.

pub const fn storage_tag(&self) -> StorageTag

Returns the StorageTag that describes the byte layout used by this policy.

Trait Implementations

impl Clone for CompressionPolicy

fn clone(&self) -> CompressionPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompressionPolicy

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

Formats the value using the given formatter.

impl Hash for CompressionPolicy

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

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 CompressionPolicy

fn eq(&self, other: &CompressionPolicy) -> 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 Copy for CompressionPolicy

impl Eq for CompressionPolicy

impl StructuralPartialEq for CompressionPolicy