HnswConfig

edgevec::hnsw::config

Struct HnswConfig 

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#[repr(C)]
pub struct HnswConfig {
    pub m: u32,
    pub m0: u32,
    pub ef_construction: u32,
    pub ef_search: u32,
    pub dimensions: u32,
    pub metric: u32,
    pub _reserved: [u32; 2],
}
Expand description

HNSW algorithm parameters.

§Size

32 bytes, aligned to 4

§Parameter Guidelines (from paper)

  • M: 12-48 for high recall, 4-8 for speed
  • ef_construction: Higher = better quality, slower build
  • ef_search: Higher = better recall, slower search

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§m: u32

Max connections per node in layers > 0 Typical: 16

§m0: u32

Max connections per node in layer 0 (typically 2*M) Typical: 32

§ef_construction: u32

Construction-time candidate list size Typical: 200

§ef_search: u32

Search-time candidate list size Typical: 50

§dimensions: u32

Vector dimensionality

§metric: u32

Distance metric (0 = L2, 1 = Cosine, 2 = Dot)

§_reserved: [u32; 2]

Reserved for future use

Implementations§

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impl HnswConfig

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pub const METRIC_L2_SQUARED: u32 = 0u32

Metric code for L2 Squared distance.

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pub const METRIC_COSINE: u32 = 1u32

Metric code for Cosine Similarity.

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pub const METRIC_DOT_PRODUCT: u32 = 2u32

Metric code for Dot Product.

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pub fn new(dimensions: u32) -> Self

Creates a default configuration.

Trait Implementations§

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impl Clone for HnswConfig

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fn clone(&self) -> HnswConfig

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for HnswConfig

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for HnswConfig

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for HnswConfig

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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

Serialize this value into the given Serde serializer. Read more
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impl Eq for HnswConfig

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impl StructuralPartialEq for HnswConfig

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