Function benchmark 

pub fn benchmark<F>(iterations: usize, f: F) -> Result<usize, Error>
where
    F: FnMut(),

Available on crate feature bench only.

Benchmarks “time” required to run the provided function.

Runs the provided function iterations times, and returns the mean number of system timer increments per iteration.

Errors

Returns Error::SystemTimerWrapped if the system timer counter has wrapped when benchmarking.