Trait TimedFutureExt 

pub trait TimedFutureExt: Future {
    // Provided method
    fn timed<F>(self, f: F) -> Timed<Self, F> 
       where Self: Sized,
             F: FnOnce(Timing) { ... }
}

An extension trait for Futures that adds the timed method.

Provided Methods

fn timed<F>(self, f: F) -> Timed<Self, F>

where Self: Sized, F: FnOnce(Timing),

Instrument a future to record its timing

The busy and idle time for the future will be passed as an argument to the provided closure. See the documentation for Timing for more details.

Examples

use future_timed::{TimedFutureExt, Timing};

let output = async {
    // Block the executor
    std::thread::sleep(Duration::from_micros(200));
    tokio::time::sleep(Duration::from_micros(10)).await;
    42
}.timed(|Timing { idle, busy }| {
    assert!(idle > Duration::from_micros(10));
    assert!(busy > Duration::from_micros(200));
})
. await;

assert_eq!(output, 42);

Implementors

impl<T: Future> TimedFutureExt for T