Expand description
Temporal quantification.
Examples:
There are multiple ways to create a new Duration
:
let five_seconds = Duration::from_secs(5);
assert_eq!(five_seconds, Duration::from_millis(5_000));
assert_eq!(five_seconds, Duration::from_micros(5_000_000));
assert_eq!(five_seconds, Duration::from_nanos(5_000_000_000));
let ten_seconds = Duration::from_secs(10);
let seven_nanos = Duration::from_nanos(7);
let total = ten_seconds + seven_nanos;
assert_eq!(total, Duration::new(10, 7));
RunUsing Instant
to calculate how long a function took to run:
ⓘ
let now = Instant::now();
// Calling a slow function, it may take a while
slow_function();
let elapsed_time = now.elapsed();
println!("Running slow_function() took {} seconds.", elapsed_time.as_secs());
RunStructs
FromFloatSecsErrorExperimental
An error which can be returned when converting a floating-point value of seconds
into a Duration
.
A Duration
type to represent a span of time, typically used for system
timeouts.
A measurement of the system clock, useful for talking to external entities like the file system or other processes.
An error returned from the duration_since
and elapsed
methods on
SystemTime
, used to learn how far in the opposite direction a system time
lies.
Constants
An anchor in time which can be used to create new SystemTime
instances or
learn about where in time a SystemTime
lies.