Don't collect a Vec.

Author: tnull

lightning/src/routing/router.rs

@@ -1772,13 +1772,11 @@ fn build_route_from_hops_internal<L: Deref>(
 	network_graph: &ReadOnlyNetworkGraph, final_value_msat: u64, final_cltv_expiry_delta: u32,
 	logger: L, random_seed_bytes: &[u8; 32]) -> Result<Route, LightningError> where L::Target: Logger {
 
-	let hop_ids: Vec<NodeId> = core::iter::once(NodeId::from_pubkey(&our_node_pubkey))
-		.chain(hops.iter().map(|hop_pubkey| NodeId::from_pubkey(&hop_pubkey))).collect();
-
 	let filter_by_nodeids = |_short_channel_id: u64, _send_amt_msat: u64, _capacity_msat: u64,
 		source: &NodeId, target: &NodeId| {
-			if hop_ids.iter().find(|x| **x == *source).is_some()
-				&& hop_ids.iter().find(|x| **x == *target).is_some() {
+		let mut hop_iter = core::iter::once(NodeId::from_pubkey(&our_node_pubkey)).chain(hops.iter().map(|hop_pubkey| NodeId::from_pubkey(&hop_pubkey)));
+			if hop_iter.clone().find(|x| *x == *source).is_some()
+				&& hop_iter.find(|x| *x == *target).is_some() {
 					0
 				} else {
 					u64::max_value()