f Avoid superfluous collect

Author: tnull

lightning/src/util/sweep.rs

@@ -318,22 +318,18 @@ where
 		&self, mut output_descriptors: Vec<SpendableOutputDescriptor>,
 		channel_id: Option<ChannelId>, exclude_static_ouputs: bool,
 	) {
-		let relevant_descriptors = if exclude_static_ouputs {
-			output_descriptors
-				.drain(..)
-				.filter(|desc| !matches!(desc, SpendableOutputDescriptor::StaticOutput { .. }))
-				.collect::<Vec<_>>()
-		} else {
-			output_descriptors
-		};
-
-		if relevant_descriptors.is_empty() {
-			return;
-		}
-
+		let relevant_descriptors = output_descriptors
+			.drain(..)
+			.filter(|desc| {
+				!(exclude_static_ouputs &&
+				matches!(desc, SpendableOutputDescriptor::StaticOutput { .. }))
+			});
+
+		let mut processed_outputs = false;
 		{
 			let mut locked_outputs = self.outputs.lock().unwrap();
 			for descriptor in relevant_descriptors {
+				processed_outputs = true;
 				let id = self.entropy_source.get_secure_random_bytes();
 				let output_info = TrackedSpendableOutput {
 					id,
@@ -353,7 +349,9 @@ where
 			}
 		}
 
-		self.rebroadcast_if_necessary();
+		if processed_outputs {
+			self.rebroadcast_if_necessary();
+		}
 	}
 
 	/// Returns a list of the currently tracked spendable outputs.