Struct Histogram 

pub struct Histogram<const N: usize, const SHIFT: u32> { /* private fields */ }

2026-09-26: A histogram with N finite power-of-two buckets plus +Inf.

A value lands in the first bucket i whose bound 2^(SHIFT + i) covers it, or in the overflow slot. Placing it is a leading-zeros count.

Implementations

impl<const N: usize, const SHIFT: u32> Histogram<N, SHIFT>

pub const fn new() -> Self

pub const fn bucket_of(v: u64) -> usize

2026-09-26: The bucket index for v, N meaning +Inf.

pub const fn upper_bound(i: usize) -> u64

pub fn observe(&self, v: u64)

pub fn count(&self) -> u64

pub fn snapshot(&self) -> HistogramSnapshot

Trait Implementations

impl<const N: usize, const SHIFT: u32> Debug for Histogram<N, SHIFT>

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

Formats the value using the given formatter.

impl<const N: usize, const SHIFT: u32> Default for Histogram<N, SHIFT>

fn default() -> Self

Returns the “default value” for a type.