Struct AmdSubstages 

pub struct AmdSubstages {
    pub workspace_new_us: u64,
    pub run_elimination_us: u64,
    pub finalize_permutation_us: u64,
}

Per-sub-stage wall-clock breakdown of one AMD call.

Returned by amd_order_substages alongside the permutation. All fields are wall-clock microseconds for that single call. Sum is approximately equal to the total time reported by amd_order_full’s OrderingStats::time_us, modulo a few hundred ns of Instant::now() overhead.

Used by the small-n diagnostic probe feral::bin::diag_amd_substages to attribute the per-call AMD cost between workspace allocation, the main elimination loop, and permutation finalisation. See dev/plans/phase-2.13-tail-diagnostic.md step 5.

Fields

workspace_new_us: u64

Time spent in AmdWorkspace::new: input ingest, vector allocations, initial degree lists, dense-row deferral.

run_elimination_us: u64

Time spent in the main pivot/eliminate/finalize loop (select_pivot + create_element + finalize_step).

finalize_permutation_us: u64

Time spent in the assembly-tree postorder and final permutation emission.

Trait Implementations

impl Clone for AmdSubstages

fn clone(&self) -> AmdSubstages

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AmdSubstages

impl Debug for AmdSubstages

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

Formats the value using the given formatter.

impl Default for AmdSubstages

fn default() -> AmdSubstages

Returns the “default value” for a type.