Struct CycleTelemetry 

pub struct CycleTelemetry {
    pub static_sccs: usize,
    pub phantom_sccs: usize,
    pub live_cycles_witnessed: usize,
    pub circ_cells_stamped: usize,
    pub settle_passes_total: usize,
    pub max_passes_single_scc: usize,
    pub iterated_sccs: usize,
    pub converged_sccs: usize,
    pub capped_sccs: usize,
    pub max_abs_delta_at_stop: f64,
    pub nan_converged: usize,
    pub elapsed_ms: u128,
}

Per-recalc telemetry for SCC evaluation under CycleDetection::Runtime (spec formualizer-cycle-semantics-spec.md §10).

Collection is unconditional: SCC tasks are rare relative to ordinary vertex evaluation and the counters are a handful of integer adds per task, so no config flag gates them (unlike VirtualDepTelemetry, which pays per-schedule costs). Counters reset at the start of every evaluation request.

Fields

static_sccs: usize

SCC tasks executed (static SCCs that reached Runtime evaluation).

phantom_sccs: usize

SCC tasks whose live subgraph was acyclic — values produced.

live_cycles_witnessed: usize

Distinct live cycles witnessed across all SCC tasks.

circ_cells_stamped: usize

Cells stamped #CIRC! by Runtime SCC tasks.

settle_passes_total: usize

Evaluation sweeps over (subsets of) SCC members, totalled across tasks (pass 1 included).

max_passes_single_scc: usize

Largest pass count any single SCC task needed.

iterated_sccs: usize

SCC tasks that entered iterative calculation (CyclePolicy::Iterate with a witnessed live cycle). RFC #113, Stage 3.

converged_sccs: usize

Iterating SCC tasks that stopped because every member passed the spec-§6 convergence test.

capped_sccs: usize

SCC tasks that stopped at a pass cap. Under CyclePolicy::Iterate this is the Excel max_iterations cap (NOT an error — last values are kept; includes the no-convergence-test max_iterations: 1 contract). Under CyclePolicy::Error it is the defensive acyclic settle cap (|SCC| + 2), which only a bug can hit.

max_abs_delta_at_stop: f64

Largest |Δ| observed in any member’s final-pass convergence comparison across iterating SCC tasks (numeric-class members only). 0.0 when no comparison ran (e.g. max_iterations: 1).

nan_converged: usize

Identical-bit NaN vs NaN member comparisons that were treated as converged (spec §6 NaN rule).

elapsed_ms: u128

Total wall-clock time spent inside Runtime SCC tasks.

Trait Implementations

impl Clone for CycleTelemetry

fn clone(&self) -> CycleTelemetry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CycleTelemetry

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

Formats the value using the given formatter.

impl Default for CycleTelemetry

fn default() -> CycleTelemetry

Returns the “default value” for a type.

impl PartialEq for CycleTelemetry

fn eq(&self, other: &CycleTelemetry) -> 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 CycleTelemetry