Struct EwmaTracker 

pub struct EwmaTracker { /* private fields */ }

Pure-math EWMA with promote/demote thresholds. Stateless — caller supplies the prior and the observation.

Implementations

impl EwmaTracker

pub const fn new() -> Self

Recommended defaults: alpha=0.1 (~72h half-life at typical rates), promote at 0.4 / 10 samples, demote at 0.1 / 50 samples.

pub fn update(&self, prev: f32, blocked: bool) -> f32

Update the EWMA given whether the current observation was a block.

Panics (debug only)

Panics in debug builds if self.alpha is outside (0.0, 1.0). The constructor hardcodes 0.1; this assert guards any future with_alpha builder from silently breaking the weighted-average math.

pub fn should_promote(&self, ewma: f32, sample_count: u64) -> bool

Return true if the EWMA and sample count warrant promoting to a higher tier.

pub fn should_demote(&self, ewma: f32, sample_count: u64) -> bool

Return true if the EWMA and sample count warrant demoting to a lower tier.

Trait Implementations

impl Clone for EwmaTracker

fn clone(&self) -> EwmaTracker

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EwmaTracker

impl Debug for EwmaTracker

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

Formats the value using the given formatter.

impl Default for EwmaTracker

fn default() -> Self

Returns the “default value” for a type.