Optimize force_state query pattern.

Signed-off-by: Jason Volk <jason@zemos.net>

src/service/rooms/state/mod.rs

@@ -1,20 +1,17 @@
 use std::{collections::HashMap, fmt::Write, iter::once, sync::Arc};
 
 use async_trait::async_trait;
-use futures::{
-	FutureExt, Stream, StreamExt, TryFutureExt, TryStreamExt, future::join_all, pin_mut,
-};
+use futures::{FutureExt, Stream, StreamExt, TryFutureExt, TryStreamExt, future::join_all};
 use ruma::{
 	EventId, OwnedEventId, OwnedRoomId, RoomId, RoomVersionId, UserId,
-	events::{
-		AnyStrippedStateEvent, StateEventType, TimelineEventType,
-		room::member::RoomMemberEventContent,
-	},
+	events::{AnyStrippedStateEvent, StateEventType, TimelineEventType},
 	room_version_rules::AuthorizationRules,
 	serde::Raw,
 };
 use tuwunel_core::{
-	Event, PduEvent, Result, err, implement,
+	Event, PduEvent, Result, err,
+	error::inspect_debug_log,
+	implement,
 	matrix::{RoomVersionRules, StateKey, TypeStateKey, room_version},
 	result::{AndThenRef, FlatOk},
 	state_res::{StateMap, auth_types_for_event},
@@ -22,7 +19,7 @@ use tuwunel_core::{
 	utils::{
 		IterStream, MutexMap, MutexMapGuard, ReadyExt, calculate_hash,
 		mutex_map::Guard,
-		stream::{BroadbandExt, TryIgnore},
+		stream::{BroadbandExt, TryIgnore, WidebandExt},
 	},
 	warn,
 };
@@ -94,24 +91,27 @@ pub async fn force_state(
 	_statediffremoved: Arc<CompressedState>,
 	state_lock: &RoomMutexGuard,
 ) -> Result {
-	let event_ids = statediffnew
+	statediffnew
 		.iter()
 		.stream()
 		.map(|&new| parse_compressed_state_event(new).1)
-		.then(|shorteventid| {
-			self.services
+		.wide_filter_map(async |shorteventid| {
+			let event_id: OwnedEventId = self
+				.services
 				.short
-				.get_eventid_from_short::<Box<_>>(shorteventid)
+				.get_eventid_from_short(shorteventid)
+				.inspect_err(inspect_debug_log)
+				.await
+				.ok()?;
+
+			self.services
+				.timeline
+				.get_pdu(&event_id)
+				.await
+				.ok()
 		})
-		.ignore_err();
-
-	pin_mut!(event_ids);
-	while let Some(event_id) = event_ids.next().await {
-		let Ok(pdu) = self.services.timeline.get_pdu(&event_id).await else {
-			continue;
-		};
-
-		match pdu.kind {
+		.map(Ok)
+		.try_for_each(async |pdu| match pdu.kind {
 			| TimelineEventType::RoomMember => {
 				let Some(user_id) = pdu
 					.state_key
@@ -119,11 +119,11 @@ pub async fn force_state(
 					.map(UserId::parse)
 					.flat_ok()
 				else {
-					continue;
+					return Ok(());
 				};
 
-				let Ok(membership_event) = pdu.get_content::<RoomMemberEventContent>() else {
-					continue;
+				let Ok(membership_event) = pdu.get_content() else {
+					return Ok(());
 				};
 
 				self.services
@@ -137,7 +137,7 @@ pub async fn force_state(
 						None,
 						false,
 					)
-					.await?;
+					.await
 			},
 			| TimelineEventType::SpaceChild => {
 				self.services
@@ -146,10 +146,13 @@ pub async fn force_state(
 					.lock()
 					.await
 					.remove(&pdu.room_id);
+
+				Ok(())
 			},
-			| _ => continue,
-		}
-	}
+			| _ => Ok(()),
+		})
+		.boxed()
+		.await?;
 
 	self.services
 		.state_cache