Struct IoCounters 

pub struct IoCounters { /* private fields */ }

A shared set of physical-read byte counters, one per class.

Cloning shares the same counters; use IoCounters::handle to make the sharing explicit.

Implementations

impl IoCounters

pub fn new() -> Self

A fresh, independent counter set.

pub fn handle(&self) -> Self

A second handle that shares this counter set.

pub fn add_descriptor(&self, bytes: u64)

Note a descriptor blob read of bytes bytes.

pub fn add_manifest(&self, bytes: u64)

Note a field manifest read of bytes bytes.

pub fn add_index(&self, bytes: u64)

Note a hierarchical index node read of bytes bytes.

pub fn add_seed(&self, bytes: u64)

Note a seed node read of bytes bytes.

pub fn descriptor_reads(&self) -> u64

Number of descriptor blobs fetched so far (a read count, not bytes).

pub fn snapshot(&self) -> IoSnapshot

A consistent snapshot of every counter.

Trait Implementations

impl Clone for IoCounters

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IoCounters

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

Formats the value using the given formatter.

impl Default for IoCounters

fn default() -> Self

Returns the “default value” for a type.