rustHow to get execution time in Rust
Rust provides a number of ways to measure the execution time of a program.
The simplest way is to use the std::time::Instant
type from the standard library. This type provides a now()
method which returns an instance of Instant
that can be used to measure the elapsed time.
Example code
use std::time::Instant;
let start = Instant::now();
// code to measure
let elapsed = start.elapsed();
println!("Time elapsed in expensive_function() is: {:?}", elapsed);
Output example
Time elapsed in expensive_function() is: Duration { secs: 0, nanos: 54545 }
Code explanation
use std::time::Instant
: imports theInstant
type from the standard library.let start = Instant::now()
: creates an instance ofInstant
which will be used to measure the elapsed time.let elapsed = start.elapsed()
: calculates the elapsed time since thestart
instance was created.println!("Time elapsed in expensive_function() is: {:?}", elapsed)
: prints the elapsed time.
Helpful links
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