Struct BenchCounters 

pub struct BenchCounters {
    pub cow_copies: u64,
    pub arc_clones: u64,
}

A point-in-time read of the counters. Cheap Copy value so benches can snapshot before/after a measured section and diff.

Fields

cow_copies: u64

Number of times array_make_mut/map_make_mut/record_make_mut found a shared Arc (strong_count > 1) and paid the one-time O(n) copy — the “mutate-while-shared” cost value-model-spec §5 argues is bounded per share, not unbounded.

arc_clones: u64

Number of times a collection-typed Value (Array/Map/Record) was duplicated via a cheap Arc::clone (an O(1) snapshot/read) — the “sharing is O(1)” half of the same claim.

Trait Implementations

impl Clone for BenchCounters

fn clone(&self) -> BenchCounters

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BenchCounters

impl Debug for BenchCounters

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

Formats the value using the given formatter.

impl Default for BenchCounters

fn default() -> BenchCounters

Returns the “default value” for a type.

impl Eq for BenchCounters

impl PartialEq for BenchCounters

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BenchCounters