Struct LatencyHistogram 

pub struct LatencyHistogram { /* private fields */ }

A ring-buffer latency histogram for p50/p99 percentile computation.

Stores up to LATENCY_HISTOGRAM_CAPACITY recent samples. Percentiles are computed by copying and sorting the live samples on demand (this is intentional — HDR histogram is overkill for v1.1).

Implementations

impl LatencyHistogram

pub fn new() -> Self

Create an empty histogram.

pub fn record(&mut self, d: Duration)

Record a latency sample.

pub fn total_recorded(&self) -> u64

Number of samples recorded (lifetime).

pub fn live_samples(&self) -> usize

Number of live samples currently in the ring buffer.

pub fn p50(&self) -> Duration

Compute the p50 (median) latency. Returns Duration::ZERO if empty.

pub fn p99(&self) -> Duration

Compute the p99 latency. Returns Duration::ZERO if empty.

pub fn percentile(&self, p: f64) -> Duration

Compute an arbitrary percentile in [0.0, 1.0].

Trait Implementations

impl Clone for LatencyHistogram

fn clone(&self) -> LatencyHistogram

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LatencyHistogram

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

Formats the value using the given formatter.

impl Default for LatencyHistogram

fn default() -> Self

Returns the “default value” for a type.