Reduce EventId copying

src/server_server.rs

@@ -64,6 +64,7 @@ use std::{
     future::Future,
     mem,
     net::{IpAddr, SocketAddr},
+    ops::Deref,
     pin::Pin,
     sync::{Arc, RwLock, RwLockWriteGuard},
     time::{Duration, Instant, SystemTime},
@@ -1636,7 +1637,7 @@ async fn upgrade_outlier_to_timeline_pdu(
             db,
             &incoming_pdu,
             val,
-            extremities,
+            extremities.iter().map(Deref::deref),
             state_ids_compressed,
             soft_fail,
             &state_lock,
@@ -1821,7 +1822,7 @@ async fn upgrade_outlier_to_timeline_pdu(
         db,
         &incoming_pdu,
         val,
-        extremities,
+        extremities.iter().map(Deref::deref),
         state_ids_compressed,
         soft_fail,
         &state_lock,
@@ -2114,11 +2115,11 @@ pub(crate) async fn fetch_signing_keys(
 /// Append the incoming event setting the state snapshot to the state from the
 /// server that sent the event.
 #[tracing::instrument(skip(db, pdu, pdu_json, new_room_leaves, state_ids_compressed, _mutex_lock))]
-fn append_incoming_pdu(
+fn append_incoming_pdu<'a>(
     db: &Database,
     pdu: &PduEvent,
     pdu_json: CanonicalJsonObject,
-    new_room_leaves: HashSet<Box<EventId>>,
+    new_room_leaves: impl IntoIterator<Item = &'a EventId> + Clone + Debug,
     state_ids_compressed: HashSet<CompressedStateEvent>,
     soft_fail: bool,
     _mutex_lock: &MutexGuard<'_, ()>, // Take mutex guard to make sure users get the room mutex
@@ -2135,19 +2136,12 @@ fn append_incoming_pdu(
     if soft_fail {
         db.rooms
             .mark_as_referenced(&pdu.room_id, &pdu.prev_events)?;
-        db.rooms.replace_pdu_leaves(
-            &pdu.room_id,
-            &new_room_leaves.into_iter().collect::<Vec<_>>(),
-        )?;
+        db.rooms
+            .replace_pdu_leaves(&pdu.room_id, new_room_leaves.clone())?;
         return Ok(None);
     }
 
-    let pdu_id = db.rooms.append_pdu(
-        pdu,
-        pdu_json,
-        &new_room_leaves.into_iter().collect::<Vec<_>>(),
-        db,
-    )?;
+    let pdu_id = db.rooms.append_pdu(pdu, pdu_json, new_room_leaves, db)?;
 
     for appservice in db.appservice.all()? {
         if db.rooms.appservice_in_room(&pdu.room_id, &appservice, db)? {