Use human-friendly time formatting

zebra-chain/src/fmt.rs

@@ -8,7 +8,7 @@ use proptest::prelude::*;
 use proptest_derive::Arbitrary;
 
 pub mod time;
-pub use time::humantime_seconds;
+pub use time::{humantime_milliseconds, humantime_seconds};
 
 /// Wrapper to override `Debug`, redirecting it to only output the type's name.
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]

zebra-chain/src/fmt/time.rs

@@ -2,7 +2,7 @@
 
 use std::time::Duration;
 
-/// Returns a human-friendly formatted string for `duration.as_secs()`.
+/// Returns a human-friendly formatted string for the whole number of seconds in `duration`.
 pub fn humantime_seconds(duration: impl Into<Duration>) -> String {
     let duration = duration.into();
 
@@ -13,3 +13,16 @@ pub fn humantime_seconds(duration: impl Into<Duration>) -> String {
 
     format!("{}", duration)
 }
+
+/// Returns a human-friendly formatted string for the whole number of milliseconds in `duration`.
+pub fn humantime_milliseconds(duration: impl Into<Duration>) -> String {
+    let duration = duration.into();
+
+    // Truncate fractional seconds.
+    let duration_secs = Duration::from_secs(duration.as_secs());
+    let duration_millis = Duration::from_millis(duration.subsec_millis().into());
+
+    let duration = humantime::format_duration(duration_secs + duration_millis);
+
+    format!("{}", duration)
+}

zebra-state/src/service/non_finalized_state/chain.rs

@@ -15,6 +15,7 @@ use tracing::instrument;
 use zebra_chain::{
     amount::{Amount, NegativeAllowed, NonNegative},
     block::{self, Height},
+    fmt::humantime_milliseconds,
     history_tree::HistoryTree,
     orchard,
     parameters::Network,
@@ -361,8 +362,8 @@ impl Chain {
         let rebuild_time_per_block =
             rebuild_time / rebuilt_block_count.try_into().expect("fits in u32");
         info!(
-            ?rebuild_time,
-            ?rebuild_time_per_block,
+            rebuild_time = ?humantime_milliseconds(rebuild_time),
+            rebuild_time_per_block = ?humantime_milliseconds(rebuild_time_per_block),
             ?rebuilt_block_count,
             ?fork_height,
             ?fork_tip,