Enum SparseFormat 

pub enum SparseFormat {
    MaxScore,
    Bmp,
}

Sparse vector index format

Determines the on-disk layout and query execution strategy:

• MaxScore: Per-dimension variable-size blocks (DAAT — document-at-a-time). Default, optimal for general sparse retrieval with block-max pruning.
• Bmp: Fixed doc_id range blocks (BAAT — block-at-a-time). Based on Mallia, Suel & Tonellotto (SIGIR 2024). Divides the document space into fixed-size blocks and processes them in decreasing upper-bound order, enabling aggressive early termination.

Variants

MaxScore

Per-dimension variable-size blocks (existing format, DAAT MaxScore)

Bmp

Fixed doc_id range blocks (BMP, BAAT block-at-a-time)

Trait Implementations

impl Clone for SparseFormat

fn clone(&self) -> SparseFormat

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SparseFormat

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

Formats the value using the given formatter.

impl Default for SparseFormat

fn default() -> SparseFormat

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for SparseFormat

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for SparseFormat

fn eq(&self, other: &SparseFormat) -> 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 Serialize for SparseFormat

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for SparseFormat

impl Eq for SparseFormat

impl StructuralPartialEq for SparseFormat