Struct PerformanceDistribution 

pub struct PerformanceDistribution {
    pub mean_secs: f64,
    pub std_dev_secs: f64,
    pub percentiles: HashMap<u8, f64>,
    pub outlier_threshold_secs: f64,
    pub sample_count: usize,
}

Summary statistics of a kernel’s baseline execution-time samples.

Canonical unit: seconds, as f64. These used to be std::time::Duration, which quantizes to whole nanoseconds – so the same measurements expressed on a different time scale produced different published statistics, and a microsecond-scale kernel’s standard deviation could round-trip to 0 ns, driving the Welch t-statistic to infinity and its p-value to exactly 0. Duration is still used for the human-facing latency fields on BaselineProfile and RegressionAlert; nothing that feeds the statistics goes through it any more.

Fields

mean_secs: f64

Arithmetic mean of the baseline samples, in seconds.

std_dev_secs: f64

Sample standard deviation of the baseline samples, in seconds.

percentiles: HashMap<u8, f64>

50th, 90th, 95th and 99th percentiles of the baseline samples, in seconds.

outlier_threshold_secs: f64

mean + 3 * std_dev, in seconds.

sample_count: usize

Number of real samples the distribution was estimated from – required for the Welch’s t-test comparison in PerformanceRegressionDetector::check_regression / PerformanceRegressionDetector::get_status.

Trait Implementations

impl Clone for PerformanceDistribution

fn clone(&self) -> PerformanceDistribution

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PerformanceDistribution

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PerformanceDistribution

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PerformanceDistribution

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

where __S: Serializer,

Serialize this value into the given Serde serializer.