Struct ZoneStats 

pub struct ZoneStats {
    pub count: u64,
    pub total_ns: u128,
    pub min_ns: u128,
    pub max_ns: u128,
    pub sum_sq_ns: u128,
}

Per-zone aggregated statistics.

Fields

count: u64

Number of times the zone has been stopped.

total_ns: u128

Total nanoseconds spent in the zone.

min_ns: u128

Minimum single-call nanoseconds.

max_ns: u128

Maximum single-call nanoseconds.

sum_sq_ns: u128

Sum of ns^2 across calls, for stddev without FMA.

Implementations

impl ZoneStats

pub fn mean_ns(&self) -> u128

Integer mean nanoseconds (total_ns / count). Returns 0 when count is 0.

pub fn stddev_ns(&self) -> f64

Standard deviation in nanoseconds, computed as sqrt(max(0, sum_sq/count - mean^2)). Uses f64 at the last step only — no FMA, no Kahan, because the result is for reporting only.

Trait Implementations

impl Clone for ZoneStats

fn clone(&self) -> ZoneStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ZoneStats

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

Formats the value using the given formatter.

impl Default for ZoneStats

fn default() -> ZoneStats

Returns the “default value” for a type.