Struct SolverStatistics 

pub struct SolverStatistics {
    pub solve_count: u64,
    pub success_count: u64,
    pub failure_count: u64,
    pub total_iterations: u64,
    pub retry_count: u64,
    pub total_solve_time_seconds: f64,
    pub basis_rejections: u64,
    pub first_try_successes: u64,
    pub basis_offered: u64,
}

Accumulated solve metrics for a single solver instance.

Counters grow monotonically from construction. They are thread-local – each thread owns one solver instance and accumulates its own statistics. Statistics are aggregated across threads via reduction after training completes.

reset() does not zero statistics counters. They persist across model reloads for the lifetime of the solver instance.

See Solver Interface Trait SS4.3.

Fields

solve_count: u64

Total number of solve and solve_with_basis calls.

success_count: u64

Number of solves that returned Ok (optimal solution found).

failure_count: u64

Number of solves that returned Err (terminal failure after retries).

total_iterations: u64

Total simplex iterations summed across all solves.

retry_count: u64

Total retry attempts summed across all failed solves.

total_solve_time_seconds: f64

Cumulative wall-clock time spent in solver calls, in seconds.

basis_rejections: u64

Number of times solve_with_basis fell back to cold-start due to basis rejection.

first_try_successes: u64

Number of solves that returned optimal on the first attempt (before any retry).

Enables first-try rate computation: first_try_rate = first_try_successes / solve_count. The complement success_count - first_try_successes gives the number of retried solves.

basis_offered: u64

Total number of solve_with_basis calls (basis offers).

Combined with basis_rejections, enables basis hit rate computation: basis_hit_rate = 1 - basis_rejections / basis_offered.

Trait Implementations

impl Clone for SolverStatistics

fn clone(&self) -> SolverStatistics

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SolverStatistics

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

Formats the value using the given formatter.

impl Default for SolverStatistics

fn default() -> SolverStatistics

Returns the “default value” for a type.