Struct SearchPlan 

pub struct SearchPlan {
    pub stages: Vec<PipelineStage>,
    pub ef_search: usize,
    pub k: usize,
    pub use_batched_expansion: bool,
    pub prefetch_distance: usize,
    pub estimated_latency: Duration,
    pub estimated_recall: f32,
    pub created_at: Instant,
}

The search plan: a complete specification for executing a search.

Fields

stages: Vec<PipelineStage>

Pipeline stages in execution order.

ef_search: usize

ef_search parameter for HNSW.

k: usize

Final k to return.

use_batched_expansion: bool

Whether to use batched expansion.

prefetch_distance: usize

Prefetch distance (0 = disabled).

estimated_latency: Duration

Estimated total latency.

estimated_recall: f32

Estimated recall.

created_at: Instant

Plan generation timestamp.

Implementations

impl SearchPlan

pub fn simple(k: usize, ef_search: usize) -> Self

Create a simple single-stage plan (F32 only).

pub fn multi_stage(k: usize, total_vectors: usize, target_recall: f32) -> Self

Create a multi-stage plan with BPS → PQ → F32 pipeline.

pub fn total_cost(&self, dimension: usize, cost_model: &CostModel) -> f32

Get the total estimated cost.

pub fn meets_sla(&self, sla: &SearchSLA) -> bool

Check if the plan meets the SLA.

Trait Implementations

impl Clone for SearchPlan

fn clone(&self) -> SearchPlan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SearchPlan

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

Formats the value using the given formatter.