Struct metered::common::ResponseTime

pub struct ResponseTime<H: Histogram = AtomicHdrHistogram, T: Instant = StdInstant>(pub H, _);

A metric measuring the response time of an expression, that is the duration the expression needed to complete.

Because it retrieves the current time before calling the expression, computes the elapsed duration and registers it to an histogram, this is a rather heavy-weight metric better applied at entry-points.

By default, ResponseTime uses an atomic hdr histogram and a synchronized time source, which work better in multithread scenarios. Non-threaded applications can gain performance by using unsynchronized structures instead.

Tuple Fields

0: H

Trait Implementations

impl<H: Histogram, T: Instant> Clear for ResponseTime<H, T>

fn clear(&self)

Requests to clear self.

impl<H: Clone + Histogram, T: Clone + Instant> Clone for ResponseTime<H, T>

fn clone(&self) -> ResponseTime<H, T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<H: Histogram + Debug, T: Instant> Debug for ResponseTime<H, T>

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

Formats the value using the given formatter.

impl<H: Histogram, T: Instant> Default for ResponseTime<H, T>

fn default() -> Self

Returns the “default value” for a type.

impl<H: Histogram, T: Instant> Deref for ResponseTime<H, T>

type Target = H

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<H: Histogram, T: Instant> Enter for ResponseTime<H, T>

type E = T

The type returned by the enter function and carried to OnResult

fn enter(&self) -> T

enter is called when entering in an aspect

impl<H: Histogram, T: Instant, R> OnResult<R> for ResponseTime<H, T>

fn leave_scope(&self, enter: T) -> Advice

Called when an expression has exited, but the return value isn’t known. This can happen because of a panic, or if control flow bypasses a macro. This is also called by the default implementation of on_result.

fn on_result(&self, enter: Self::E, _result: &R) -> Advice

Called when an expression has returned.

impl<H: Histogram + Serialize, T: Instant> Serialize for ResponseTime<H, T>

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
    S: Serializer, 

Serialize this value into the given Serde serializer.

impl<H: Histogram, T: Instant, R> Metric<R> for ResponseTime<H, T>