Struct FdStats 

pub struct FdStats {
    pub pattern_used: Option<FdPatternSource>,
    pub n: usize,
    pub nnz: usize,
    pub groups: usize,
    pub rho_max: usize,
    pub compression: f64,
    pub coloring_fell_back: bool,
    pub objective_clique_widened: bool,
}

Fields

pattern_used: Option<FdPatternSource>

The pattern source actually used, which is not always the one requested: Declared falls back to Jacobian whenever the TNLP declares no Hessian structure. Reporting the request rather than the outcome would hide exactly the case a reader is checking for — the 17-against-341 probe-group gap on laptime is the difference between the two. None until the first update_hessian builds the structure.

n: usize

nnz: usize

groups: usize

rho_max: usize

compression: f64

Probes per Hessian as a fraction of n — the quantity a dense finite-difference scheme would pay in full.

coloring_fell_back: bool

Whether the requested star colouring failed validation and CPR was substituted.

objective_clique_widened: bool

Whether the objective clique had to fall back to a conservative structural set because the model stated no objective linearity (gh#823 review, finding 2). When this is set the clique is N, or all n when the model states no nonlinear-variable set either, and the probe count reflects that rather than the objective’s true support. A model that states get_objective_variables_linearity pays none of it.

Trait Implementations

impl Clone for FdStats

fn clone(&self) -> FdStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FdStats

impl Debug for FdStats

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

Formats the value using the given formatter.

impl Default for FdStats

fn default() -> FdStats

Returns the “default value” for a type.