Struct PercentilesTracker 

pub struct PercentilesTracker { /* private fields */ }

P-square algorithm for dynamic percentile estimation.

Maintains 5 markers for min, p50, p95, p99, max with O(1) updates. Memory: ~56 bytes

Implementations

impl PercentilesTracker

pub fn new() -> Self

Create a new tracker for p50, p95, p99.

Increments for desired positions are constants: 0, 0.5, 0.95, 0.99, 1.0 These are used inline in the update method rather than stored.

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

Update with a new sample.

pub fn get(&self) -> (f64, f64, f64)

Get percentiles (p50, p95, p99).

pub fn min(&self) -> f64

Get minimum value seen.

pub fn max(&self) -> f64

Get maximum value seen.

pub fn is_initialized(&self) -> bool

Check if tracker has enough data for meaningful percentiles.

Trait Implementations

impl Clone for PercentilesTracker

fn clone(&self) -> PercentilesTracker

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PercentilesTracker

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

Formats the value using the given formatter.

impl Default for PercentilesTracker

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PercentilesTracker

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PercentilesTracker

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.