Struct PresentStats 

pub struct PresentStats {
    pub bytes_emitted: u64,
    pub cells_changed: usize,
    pub run_count: usize,
    pub duration: Duration,
}

Statistics from a present() operation.

Captures metrics for verifying O(changes) output size and detecting performance regressions.

Fields

bytes_emitted: u64

Bytes emitted for this frame.

cells_changed: usize

Number of cells changed.

run_count: usize

Number of runs (groups of consecutive changes).

duration: Duration

Time spent in present().

Implementations

impl PresentStats

pub fn new( bytes_emitted: u64, cells_changed: usize, run_count: usize, duration: Duration, ) -> Self

Create new stats with the given values.

pub fn bytes_per_cell(&self) -> f64

Calculate bytes per cell changed.

Returns 0.0 if no cells were changed.

pub fn bytes_per_run(&self) -> f64

Calculate bytes per run.

Returns 0.0 if no runs.

pub fn within_budget(&self) -> bool

Check if output is within the expected budget.

Uses conservative estimates for worst-case bytes per cell.

pub fn log(&self)

Log stats at debug level (no-op without tracing feature).

Trait Implementations

impl Clone for PresentStats

fn clone(&self) -> PresentStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PresentStats

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

Formats the value using the given formatter.

impl Default for PresentStats

fn default() -> Self

Returns the “default value” for a type.

impl Eq for PresentStats

impl PartialEq for PresentStats

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