Struct StreamingStats 

pub struct StreamingStats { /* private fields */ }

Streaming statistics calculator using Welford’s online algorithm. Computes mean, variance, and standard deviation in a single pass without storing all values in memory.

Examples

use chie_shared::StreamingStats;

let mut stats = StreamingStats::new();

// Add some latency measurements (in ms)
for latency in [100.0, 105.0, 95.0, 110.0, 98.0] {
    stats.add(latency);
}

assert_eq!(stats.count(), 5);
assert!((stats.mean() - 101.6).abs() < 0.1);
assert!(stats.std_dev() > 0.0);

// Merge statistics from another source
let mut other_stats = StreamingStats::new();
other_stats.add(102.0);
other_stats.add(108.0);

stats.merge(&other_stats);
assert_eq!(stats.count(), 7);

Implementations

impl StreamingStats

pub fn new() -> Self

Create a new streaming statistics calculator.

pub fn add(&mut self, value: f64)

Add a new value to the statistics.

pub fn count(&self) -> u64

Get the number of samples.

pub fn mean(&self) -> f64

Get the mean.

pub fn variance(&self) -> f64

Get the variance.

pub fn sample_variance(&self) -> f64

Get the sample variance (Bessel’s correction).

pub fn std_dev(&self) -> f64

Get the standard deviation.

pub fn sample_std_dev(&self) -> f64

Get the sample standard deviation.

pub fn reset(&mut self)

Reset the statistics.

pub fn merge(&mut self, other: &StreamingStats)

Merge another StreamingStats into this one.

Trait Implementations

impl Clone for StreamingStats

fn clone(&self) -> StreamingStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StreamingStats

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

Formats the value using the given formatter.

impl Default for StreamingStats

fn default() -> Self

Returns the “default value” for a type.