Struct LatencyHistogram 

pub struct LatencyHistogram { /* private fields */ }

Per-node latency histogram with 32 power-of-two nanosecond buckets.

Bucket k covers the range [2^(k-1) ns, 2^k ns) for k >= 1. Bucket 0 covers 0 ns exactly. Bucket 31 is a catch-all for values >= 2^30 ns (~1.07 s).

All operations are O(1) for record and O(32) for percentile queries.

Implementations

impl LatencyHistogram

pub fn new() -> Self

Creates a new, empty histogram.

pub fn record(&mut self, latency_ns: u64)

Records a latency sample in nanoseconds.

pub fn mean_ns(&self) -> f64

Returns the mean latency in nanoseconds, or 0.0 if no samples recorded.

pub fn percentile_ns(&self, pct: f64) -> u64

Returns the approximate latency at the pct-th percentile (0.0-100.0).

Returns the lower bound of the bucket containing the pct-th sample.

pub fn total_samples(&self) -> u64

Returns the total number of recorded samples.

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.