Struct Hist 

pub struct Hist { /* private fields */ }

a log-linear histogram

Implementations

impl Hist

pub fn new() -> Hist

pub fn with_bits(bits: u8) -> Hist

bits linear steps per power of two as a power of two (1..=8)

pub fn bits(&self) -> u8

pub fn bucket(&self, v: u64) -> usize

the bucket a value falls into

pub fn range(&self, i: usize) -> (u64, u64)

the smallest value and the width of a bucket

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

pub fn record_n(&mut self, v: u64, n: u64)

pub fn count(&self) -> u64

pub fn sum(&self) -> u128

pub fn min(&self) -> Option<u64>

pub fn max(&self) -> Option<u64>

pub fn mean(&self) -> Option<u64>

the mean, rounded down

pub fn quantile(&self, per_mille: u32) -> Option<u64>

the value at per_mille (500: median, 990: p99, 1000: the largest)

pub fn p50(&self) -> Option<u64>

pub fn p95(&self) -> Option<u64>

pub fn p99(&self) -> Option<u64>

pub fn merge(&mut self, o: &Hist) -> bool

adds the values of another histogram of the same resolution (false otherwise)

pub fn clear(&mut self)

pub fn buckets(&self) -> Vec<(u64, u64, u64)>

the buckets that hold values: (smallest value, width, count)

Trait Implementations

impl Clone for Hist

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Hist

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

Formats the value using the given formatter.

impl Default for Hist

fn default() -> Hist

Returns the “default value” for a type.

impl Eq for Hist

impl PartialEq for Hist

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Hist