Struct Histogram 

pub struct Histogram {
    pub buckets: Vec<u64>,
    pub count: u64,
    pub sum_us: u64,
    pub max_us: u64,
}

Log2-bucketed microsecond histogram: bucket i counts values in [2^i, 2^(i+1)) µs. 32 buckets cover > an hour.

Fields

buckets: Vec<u64>

Per-bucket counts; bucket i covers [2^i, 2^(i+1)) µs (length 32).

count: u64

Total number of recorded values.

sum_us: u64

Sum of all recorded values, in microseconds.

max_us: u64

Largest recorded value, in microseconds.

Implementations

impl Histogram

pub fn new() -> Self

Create an empty histogram with 32 zeroed buckets.

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

Record a value (in microseconds) into its log2 bucket and update totals.

pub fn percentile_us(&self, p: f64) -> u64

Approximate percentile (upper bound of the containing bucket).

Trait Implementations

impl Clone for Histogram

fn clone(&self) -> Histogram

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Histogram

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

Formats the value using the given formatter.

impl Default for Histogram

fn default() -> Histogram

Returns the “default value” for a type.

impl Serialize for Histogram

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

where __S: Serializer,

Serialize this value into the given Serde serializer.