perf: optimize list rendering

src/components/NoteList/index.tsx

@@ -20,9 +20,9 @@ import PullToRefresh from 'react-simple-pull-to-refresh'
 import NoteCard from '../NoteCard'
 import PictureNoteCard from '../PictureNoteCard'
 
-const NORMAL_RELAY_LIMIT = 100
+const LIMIT = 100
-const ALGO_RELAY_LIMIT = 500
+const ALGO_LIMIT = 500
-const PICTURE_NOTE_LIMIT = 30
+const SHOW_COUNT = 20
 
 export default function NoteList({
   relayUrls,
@@ -45,22 +45,17 @@ export default function NoteList({
   const [timelineKey, setTimelineKey] = useState<string | undefined>(undefined)
   const [events, setEvents] = useState<Event[]>([])
   const [newEvents, setNewEvents] = useState<Event[]>([])
+  const [showCount, setShowCount] = useState(SHOW_COUNT)
   const [hasMore, setHasMore] = useState<boolean>(true)
   const [refreshing, setRefreshing] = useState(true)
   const [listMode, setListMode] = useState<TNoteListMode>(() => storage.getNoteListMode())
   const bottomRef = useRef<HTMLDivElement | null>(null)
   const isPictures = useMemo(() => listMode === 'pictures', [listMode])
   const noteFilter = useMemo(() => {
-    if (isPictures) {
     return {
-        kinds: [PICTURE_EVENT_KIND],
+      kinds: isPictures
-        limit: PICTURE_NOTE_LIMIT,
+        ? [PICTURE_EVENT_KIND]
-        ...filter
+        : [kinds.ShortTextNote, kinds.Repost, PICTURE_EVENT_KIND],
-      }
-    }
-    return {
-      kinds: [kinds.ShortTextNote, kinds.Repost, PICTURE_EVENT_KIND],
-      limit: NORMAL_RELAY_LIMIT,
       ...filter
     }
   }, [JSON.stringify(filter), isPictures])
@@ -80,12 +75,11 @@ export default function NoteList({
         const relayInfos = await relayInfoService.getRelayInfos(relayUrls)
         areAlgoRelays = relayInfos.every((relayInfo) => checkAlgoRelay(relayInfo))
       }
-      const filter = areAlgoRelays ? { ...noteFilter, limit: ALGO_RELAY_LIMIT } : noteFilter
 
       let eventCount = 0
       const { closer, timelineKey } = await client.subscribeTimeline(
         [...relayUrls],
-        filter,
+        { ...noteFilter, limit: areAlgoRelays ? ALGO_LIMIT : LIMIT },
         {
           onEvents: (events, eosed) => {
             if (eventCount > events.length) return
@@ -124,23 +118,25 @@ export default function NoteList({
   }, [JSON.stringify(relayUrls), noteFilter, refreshCount])
 
   const loadMore = useCallback(async () => {
-    if (!timelineKey || refreshing || !hasMore) return
+    if (showCount < events.length) {
+      setShowCount((prev) => prev + SHOW_COUNT)
+      return
+    }
 
+    if (!timelineKey || refreshing || !hasMore) return
     const newEvents = await client.loadMoreTimeline(
       timelineKey,
       events.length ? events[events.length - 1].created_at - 1 : dayjs().unix(),
-      noteFilter.limit
+      LIMIT
     )
     if (newEvents.length === 0) {
       setHasMore(false)
       return
     }
     setEvents((oldEvents) => [...oldEvents, ...newEvents])
-  }, [timelineKey, refreshing, hasMore, events, noteFilter])
+  }, [timelineKey, refreshing, hasMore, events, noteFilter, showCount])
 
   useEffect(() => {
-    if (refreshing) return
-
     const options = {
       root: null,
       rootMargin: '10px',
@@ -164,7 +160,7 @@ export default function NoteList({
         observerInstance.unobserve(currentBottomRef)
       }
     }
-  }, [refreshing, loadMore])
+  }, [loadMore])
 
   const showNewEvents = () => {
     setEvents((oldEvents) => [...newEvents, ...oldEvents])
@@ -177,6 +173,7 @@ export default function NoteList({
         listMode={listMode}
         setListMode={(listMode) => {
           setListMode(listMode)
+          setShowCount(SHOW_COUNT)
           topRef.current?.scrollIntoView({ behavior: 'instant', block: 'end' })
           storage.setNoteListMode(listMode)
         }}
@@ -190,7 +187,8 @@ export default function NoteList({
         pullingContent=""
       >
         <div>
-          {newEvents.filter((event: Event) => {
+          {events.length > 0 &&
+            newEvents.filter((event: Event) => {
               return (
                 (!filterMutedNotes || !mutePubkeys.includes(event.pubkey)) &&
                 (listMode !== 'posts' || !isReplyNoteEvent(event))
@@ -206,11 +204,12 @@ export default function NoteList({
             <PictureNoteCardMasonry
               className="px-2 sm:px-4 mt-2"
               columnCount={isLargeScreen ? 3 : 2}
-              events={events}
+              events={events.slice(0, showCount)}
             />
           ) : (
             <div>
               {events
+                .slice(0, showCount)
                 .filter((event: Event) => listMode !== 'posts' || !isReplyNoteEvent(event))
                 .map((event) => (
                   <NoteCard

src/components/NotificationList/index.tsx

@@ -26,6 +26,7 @@ import { FormattedTimestamp } from '../FormattedTimestamp'
 import UserAvatar from '../UserAvatar'
 
 const LIMIT = 100
+const SHOW_COUNT = 30
 
 const NotificationList = forwardRef((_, ref) => {
   const { t } = useTranslation()
@@ -34,6 +35,7 @@ const NotificationList = forwardRef((_, ref) => {
   const [timelineKey, setTimelineKey] = useState<string | undefined>(undefined)
   const [refreshing, setRefreshing] = useState(true)
   const [notifications, setNotifications] = useState<Event[]>([])
+  const [showCount, setShowCount] = useState(SHOW_COUNT)
   const [until, setUntil] = useState<number | undefined>(dayjs().unix())
   const bottomRef = useRef<HTMLDivElement | null>(null)
   useImperativeHandle(
@@ -70,15 +72,23 @@ const NotificationList = forwardRef((_, ref) => {
           onEvents: (events, eosed) => {
             if (eventCount > events.length) return
             eventCount = events.length
-            setUntil(events.length >= LIMIT ? events[events.length - 1].created_at - 1 : undefined)
             setNotifications(events.filter((event) => event.pubkey !== pubkey))
             if (eosed) {
               setRefreshing(false)
+              setUntil(events.length >= 0 ? events[events.length - 1].created_at - 1 : undefined)
             }
           },
           onNew: (event) => {
             if (event.pubkey === pubkey) return
-            setNotifications((oldEvents) => [event, ...oldEvents])
+            setNotifications((oldEvents) => {
+              const index = oldEvents.findIndex(
+                (oldEvent) => oldEvent.created_at < event.created_at
+              )
+              if (index === -1) {
+                return [...oldEvents, event]
+              }
+              return [...oldEvents.slice(0, index), event, ...oldEvents.slice(index)]
+            })
           }
         }
       )
@@ -93,26 +103,30 @@ const NotificationList = forwardRef((_, ref) => {
   }, [pubkey, refreshCount])
 
   const loadMore = useCallback(async () => {
+    if (showCount < notifications.length) {
+      setShowCount((count) => count + SHOW_COUNT)
+      return
+    }
+
     if (!pubkey || !timelineKey || !until || refreshing) return
-    const notifications = await client.loadMoreTimeline(timelineKey, until, LIMIT)
+
-    if (notifications.length === 0) {
+    const newNotifications = await client.loadMoreTimeline(timelineKey, until, LIMIT)
+    if (newNotifications.length === 0) {
       setUntil(undefined)
       return
     }
 
-    if (notifications.length > 0) {
+    if (newNotifications.length > 0) {
       setNotifications((oldNotifications) => [
         ...oldNotifications,
-        ...notifications.filter((event) => event.pubkey !== pubkey)
+        ...newNotifications.filter((event) => event.pubkey !== pubkey)
       ])
     }
 
-    setUntil(notifications[notifications.length - 1].created_at - 1)
+    setUntil(newNotifications[newNotifications.length - 1].created_at - 1)
-  }, [pubkey, timelineKey, until, refreshing])
+  }, [pubkey, timelineKey, until, refreshing, showCount, notifications])
 
   useEffect(() => {
-    if (refreshing) return
-
     const options = {
       root: null,
       rootMargin: '10px',
@@ -136,7 +150,7 @@ const NotificationList = forwardRef((_, ref) => {
         observerInstance.unobserve(currentBottomRef)
       }
     }
-  }, [refreshing, loadMore])
+  }, [loadMore])
 
   return (
     <PullToRefresh
@@ -147,7 +161,7 @@ const NotificationList = forwardRef((_, ref) => {
       pullingContent=""
     >
       <div>
-        {notifications.map((notification) => (
+        {notifications.slice(0, showCount).map((notification) => (
           <NotificationItem key={notification.id} notification={notification} />
         ))}
         <div className="text-center text-sm text-muted-foreground">

src/services/client.service.ts

@@ -320,7 +320,8 @@ class ClientService extends EventTarget {
               timeline.refs = newRefs.concat(timeline.refs)
               onEvents(newEvents.concat(cachedEvents), true)
             }
-          }
+          },
+          eoseTimeout: 10000 // 10s
         })
       }
     })