Struct SubMsStageSummary 

pub struct SubMsStageSummary {
    pub name: String,
    pub count: usize,
    pub p50_ns: u64,
    pub p99_ns: u64,
    pub p999_ns: u64,
    pub max_ns: u64,
    pub mean_ns: u64,
    pub stddev_ns: u64,
    pub cdf_buckets_ns: Vec<u64>,
    pub jitter_score: f64,
    pub samples_ns: Option<Vec<u64>>,
}

Per-stage summary. The counterpart of one stages.<name> entry in the subms JSON contract.

samples_ns carries the downsampled (max-500) chronological timeline emitted by crate::summarize; crate::summarize_lean leaves it None.

Does NOT derive Eq because jitter_score: f64 can be NaN. Use PartialEq instead, and prefer comparing the integer fields explicitly in tests rather than assert_eq!-ing the whole struct.

Fields

name: String

count: usize

p50_ns: u64

p99_ns: u64

p999_ns: u64

max_ns: u64

mean_ns: u64

stddev_ns: u64

Sample-standard-deviation across the (post-warmup-skip) timings. 0 when count < 2. Added in subms 0.4.0; the JSON contract emits it as stddev_ns and older readers ignore the field.

cdf_buckets_ns: Vec<u64>

Log2-spaced histogram of the chronological samples. 64 buckets covering 1ns .. ~18.4s (2^0 .. 2^64 ns). Each entry is the count of samples whose value falls in [2^i, 2^(i+1)) nanoseconds. Empty (all-zero) when the stage has no samples. The full CDF can be reconstructed by cumulative sum across the array.

Added in subms 0.5.0; the JSON contract emits it as cdf_buckets_ns and older readers ignore the field.

jitter_score: f64

Jitter score in [0.0, 1.0]: coefficient of variation of the per-window mean across non-overlapping 32-sample windows, clamped. 0 = perfectly stable measurement environment, 1+ = the underlying noise floor dominates the signal. Useful for spotting bench runs where the measurement rig was unstable, separate from the algorithm’s own tail.

Added in subms 0.5.0.

samples_ns: Option<Vec<u64>>

Trait Implementations

impl Clone for SubMsStageSummary

fn clone(&self) -> SubMsStageSummary

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SubMsStageSummary

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

Formats the value using the given formatter.

impl PartialEq for SubMsStageSummary

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for SubMsStageSummary