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.