Struct CostBasedStats 

pub struct CostBasedStats {
    pub alternatives_explored: usize,
    pub original_cost: f64,
    pub optimized_cost: f64,
    pub rewrites_applied: usize,
    pub time_us: u64,
}

Statistics from cost-based optimization.

Fields

alternatives_explored: usize

Number of alternative expressions explored

original_cost: f64

Original expression cost

optimized_cost: f64

Optimized expression cost

rewrites_applied: usize

Number of rewrites applied

time_us: u64

Time spent in microseconds

Implementations

impl CostBasedStats

pub fn cost_reduction_percent(&self) -> f64

Calculate cost reduction percentage.

pub fn is_beneficial(&self) -> bool

Check if optimization was beneficial.

pub fn cost_ratio(&self) -> f64

Get the cost ratio (optimized / original).

Trait Implementations

impl Clone for CostBasedStats

fn clone(&self) -> CostBasedStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CostBasedStats

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

Formats the value using the given formatter.

impl PartialEq for CostBasedStats

fn eq(&self, other: &CostBasedStats) -> 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 StructuralPartialEq for CostBasedStats