Time Async Rust Functions

time_async.rs

async fn time_async<F, O>(f: F) -> (O, Duration)
where
    F: std::future::Future<Output = O>,
{
    let start = std::time::Instant::now();
    let out = f.await;
    let duration = start.elapsed();
    (out, duration)
}

async fn log_time_async<F, O>(f: F) -> O
where
    F: std::future::Future<Output = O>,
    O: Debug,
{
    let (out, duration) = time_async(f).await;
    dbg!(&out, duration);
    out
}