Struct exponential_decay_histogram::Snapshot

pub struct Snapshot { /* fields omitted */ }

A snapshot of the state of an ExponentialDecayHistogram at some point in time.

Methods

impl Snapshot

pub fn value(&self, quantile: f64) -> i64

Returns the value at a specified quantile in the snapshot, or 0 if it is empty.

For example, snapshot.value(0.5) returns the median value of the snapshot.

Panics

Panics if quantile is not between 0 and 1 (inclusive).

pub fn max(&self) -> i64

Returns the largest value in the snapshot, or 0 if it is empty.

pub fn min(&self) -> i64

Returns the smallest value in the snapshot, or 0 if it is empty.

pub fn mean(&self) -> f64

Returns the mean of the values in the snapshot, or 0 if it is empty.

pub fn stddev(&self) -> f64

Returns the standard deviation of the values in the snapshot, or 0 if it is empty.

pub fn count(&self) -> u64

Returns the number of values which have been written to the histogram at the time of the snapshot.

Important traits for Values<'a>

impl<'a> Iterator for Values<'a> type Item = (i64, f64);

pub fn values<'a>(&'a self) -> Values<'a>

Returns an iterator over the distinct values in the snapshot along with their weights.