f Start measuring fee rate cache update time right before

Author: tnull

src/lib.rs

@@ -856,6 +856,7 @@ impl<K: KVStore + Sync + Send + 'static> Node<K> {
 								}
 							}
 							_ = fee_rate_update_interval.tick() => {
+								let now = Instant::now();
 								match wallet.update_fee_estimates().await {
 									Ok(()) => log_trace!(
 										sync_logger,