Struct CostModel 

pub struct CostModel { /* private fields */ }

Cost-model entrypoint used by the optimizer dispatcher.

Implementations

impl CostModel

pub fn new(parameters: IndexParameters, weights: CostWeights) -> Self

Construct a cost model with explicit parameters and weights.

pub fn weights_mut(&mut self) -> &mut CostWeights

Return mutable access to the weights for online adaptation.

pub fn weights(&self) -> &CostWeights

Borrow the current weights.

pub fn parameters(&self) -> &IndexParameters

Borrow the current parameters.

pub fn recall_floor(family: IndexFamily) -> f32

Recall floor that an index family is expected to deliver at its default parameter configuration.

pub fn estimate( &self, family: IndexFamily, workload: &WorkloadProfile, ) -> CostEstimate

Estimate the (cost, recall) pair for executing workload against family.

cost is in abstract distance-equivalent units (higher = slower); recall is a 0..1 estimate. Cost is multiplied by the learned per-family weight.

Trait Implementations

impl Clone for CostModel

fn clone(&self) -> CostModel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CostModel

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

Formats the value using the given formatter.

impl Default for CostModel

fn default() -> CostModel

Returns the “default value” for a type.