Use human readable durations for logs

Cargo.toml

@@ -13,6 +13,7 @@ license = "MIT"
 [dependencies]
 log = "0.4"
 rand = "0.8"
+humantime = "2.1"
 async-lock = "2.3"
 async-timer = "0.7"
 

src/cache.rs

@@ -149,9 +149,9 @@ where
  /// cache storing expired entries (assuming the monitor just ran), so make sure
  /// to tune your frequency, sample size, and threshold accordingly.
  pub async fn purge(&self, sample: usize, threshold: f64) {
- let started = Instant::now();
+ let start = Instant::now();
+ let locked = Duration::from_nanos(0);
 
- let mut locked = 0;
  let mut removed = 0;
 
  loop {
@@ -228,8 +228,8 @@ where
  store.remove(key);
  }
 
- // increment the lock timer in millis
- locked += acquired.elapsed().as_millis();
+ // increment the lock timer tracking directly
+ locked.checked_add(acquired.elapsed()).unwrap();
  }
 
  // log out now many of the sampled keys were removed
@@ -254,11 +254,11 @@ where
 
  // log out the completion as well as the time taken in millis
  debug!(
- "{}purge loop removed {} entries in {}ms ({}ms locked)",
+ "{}purge loop removed {} entries in {} ({} locked)",
  self.label,
  removed,
- started.elapsed().as_millis(),
- locked
+ humantime::format_duration(start.elapsed()),
+ humantime::format_duration(locked)
  );
  }