diff --git a/packages/ui-default/build/config/webpack.ts b/packages/ui-default/build/config/webpack.ts
index 6edf19584..5078069da 100644
--- a/packages/ui-default/build/config/webpack.ts
+++ b/packages/ui-default/build/config/webpack.ts
@@ -146,10 +146,21 @@ export default function (env: { production?: boolean, measure?: boolean } = {})
         },
         {
           test: /\.[mc]?[jt]sx?$/,
-          exclude: /@types\//,
+          exclude: [/@types\//, /components\/message\//],
           type: 'javascript/auto',
           use: [esbuildLoader()],
         },
+        {
+          test: /\.[mc]?[jt]sx?$/,
+          include: /components\/message\//,
+          type: 'javascript/auto',
+          use: [{
+            loader: 'ts-loader',
+            options: {
+              transpileOnly: true,
+            },
+          }],
+        },
         {
           test: /\.styl$/,
           use: [extractCssLoader(), cssLoader(), postcssLoader(), stylusLoader()],
diff --git a/packages/ui-default/components/message/index.page.ts b/packages/ui-default/components/message/index.page.ts
index 146f65aaa..c18e57d0f 100644
--- a/packages/ui-default/components/message/index.page.ts
+++ b/packages/ui-default/components/message/index.page.ts
@@ -9,9 +9,10 @@ import tpl from 'vj/utils/tpl';
 
 const onmessage = (msg) => {
   console.log('Received message', msg);
+  if (document.hidden) return false;
   if (msg.mdoc.flag & FLAG_ALERT) {
     // Is alert
-    return new InfoDialog({
+    new InfoDialog({
       cancelByClickingBack: false,
       $body: tpl`
         <div class="typo">
@@ -19,9 +20,10 @@ const onmessage = (msg) => {
           <p>${i18n(msg.mdoc.content)}</p>
         </div>`,
     }).open();
+    return true;
   }
   // Is message
-  return new VjNotification({
+  new VjNotification({
     ...(msg.udoc._id === 1 && msg.mdoc.flag & 4)
       ? { message: i18n('You received a system message, click here to view.') }
       : {
@@ -32,6 +34,26 @@ const onmessage = (msg) => {
     duration: 15000,
     action: () => window.open(`/home/messages?uid=${msg.udoc._id}`, '_blank'),
   }).show();
+  return true;
+};
+
+const url = new URL('/home/messages-conn', window.location.href);
+// TODO handle a better way for cookie
+url.searchParams.append('sid', document.cookie);
+const endpoint = url.toString().replace('http', 'ws');
+
+const initWorkerMode = () => {
+  console.log('Messages: using SharedWorker');
+  const worker = new SharedWorker(new URL('./worker', import.meta.url), { name: 'Hydro Messages Worker' });
+  worker.port.start();
+  worker.port.postMessage({ type: 'conn', path: endpoint, cookie: document.cookie });
+  worker.port.onmessage = async (message) => {
+    if (process.env.NODE_ENV !== 'production') console.log('onmessage: ', message);
+    const { payload, type } = message.data;
+    if (type === 'message') {
+      if (onmessage(payload)) worker.port.postMessage({ type: 'ack', id: payload.mdoc._id });
+    }
+  };
 };
 
 const messagePage = new AutoloadPage('messagePage', (pagename) => {
@@ -44,11 +66,16 @@ const messagePage = new AutoloadPage('messagePage', (pagename) => {
       action: () => window.open('/home/messages', '_blank'),
     }).show();
   }
+  if (window.SharedWorker) {
+    initWorkerMode();
+    return;
+  }
   if (!window.BroadcastChannel) {
     console.error('BoardcastChannel not supported');
     return;
   }
 
+  console.log('Messages: using BroadcastChannel');
   let isMaster = false;
   const selfId = nanoid();
   const channel = new BroadcastChannel('hydro-messages');
@@ -70,45 +97,19 @@ const messagePage = new AutoloadPage('messagePage', (pagename) => {
     isMaster = true;
     localStorage.setItem('page.master', selfId);
     const masterChannel = new BroadcastChannel('hydro-messages');
-    const url = new URL('/home/messages-conn', window.location.href.replace('http', 'ws'));
-    // TODO handle a better way for cookie
-    url.searchParams.append('sid', document.cookie);
     const sock = new ReconnectingWebsocket(url.toString());
-    const pending = {};
     sock.onopen = () => console.log('Connected');
     sock.onerror = console.error;
     sock.onclose = (...args) => console.log('Closed', ...args);
     sock.onmessage = async (message) => {
       if (process.env.NODE_ENV !== 'production') console.log('onmessage: ', message);
       const payload = JSON.parse(message.data);
-      const id = nanoid();
-      masterChannel.postMessage({ type: 'message', id, payload });
-      const success = await new Promise<boolean>((resolve) => {
-        pending[id] = resolve;
-        setTimeout(() => {
-          delete pending[id];
-          resolve(false);
-        }, 1000);
-      });
-      if (!success && window.Notification?.permission === 'granted') {
-        const notification = new window.Notification(
-          payload.udoc.uname || 'Hydro Notification',
-          {
-            icon: payload.udoc.avatarUrl || '/android-chrome-192x192.png',
-            body: payload.mdoc.content,
-          },
-        );
-        notification.onclick = () => window.open('/home/messages');
-      }
-    };
-    masterChannel.onmessage = (msg) => {
-      if (msg.data.type === 'message-push') pending[msg.data.id]?.(true);
+      masterChannel.postMessage({ type: 'message', payload });
     };
   }
 
   channel.onmessage = (msg) => {
     if (msg.data.type === 'message' && !document.hidden) {
-      channel.postMessage({ type: 'message-push', id: msg.data.id });
       onmessage(msg.data.payload);
     }
     if (msg.data.type === 'master') {
diff --git a/packages/ui-default/components/message/worker.ts b/packages/ui-default/components/message/worker.ts
new file mode 100644
index 000000000..38cae6cc4
--- /dev/null
+++ b/packages/ui-default/components/message/worker.ts
@@ -0,0 +1,80 @@
+/* eslint-disable no-restricted-globals */
+/// <reference types="@types/sharedworker" />
+import ReconnectingWebsocket from 'reconnecting-websocket';
+
+console.log('SharedWorker init');
+
+let conn: ReconnectingWebsocket;
+let lcookie: string;
+const ports: MessagePort[] = [];
+interface RequestInitSharedConnPayload {
+  type: 'conn';
+  cookie: string;
+  path: string;
+}
+interface RequestAckPayload {
+  type: 'ack';
+  id: string;
+}
+type RequestPayload = RequestInitSharedConnPayload | RequestAckPayload;
+const ack = {};
+
+function broadcastMsg(message: any) {
+  for (const p of ports) p.postMessage(message);
+}
+function initConn(path: string, port: MessagePort, cookie: any) {
+  if (cookie !== lcookie) conn?.close();
+  else if (conn && conn.readyState === conn.OPEN) return;
+  lcookie = cookie;
+  console.log('Init connection for', path);
+  conn = new ReconnectingWebsocket(path);
+  ports.push(port);
+  conn.onopen = () => conn.send(cookie);
+  conn.onerror = () => broadcastMsg({ type: 'error' });
+  conn.onclose = (ev) => broadcastMsg({ type: 'close', error: ev.reason });
+  conn.onmessage = (message) => {
+    if (process.env.NODE_ENV !== 'production') console.log('SharedWorker.port.onmessage: ', message);
+    const payload = JSON.parse(message.data);
+    if (payload.event === 'auth') {
+      if (['PermissionError', 'PrivilegeError'].includes(payload.error)) {
+        broadcastMsg({ type: 'close', error: payload.error });
+        conn.close();
+      } else {
+        console.log('Connected to', path);
+        broadcastMsg({ type: 'open' });
+      }
+    } else {
+      broadcastMsg({ type: 'message', payload });
+      let acked = false;
+      ack[payload.mdoc.id] = () => { acked = true; };
+      setTimeout(() => {
+        delete ack[payload.mdoc.id];
+        if (acked) return;
+        if (Notification?.permission !== 'granted') {
+          console.log('Notification permission denied');
+          return;
+        }
+        const notification = new Notification(
+          payload.udoc.uname || 'Hydro Notification',
+          {
+            icon: payload.udoc.avatarUrl || '/android-chrome-192x192.png',
+            body: payload.mdoc.content,
+          },
+        );
+        notification.onclick = () => window.open('/home/messages');
+      }, 5000);
+    }
+  };
+}
+
+// eslint-disable-next-line no-undef
+onconnect = function (e) {
+  const port = e.ports[0];
+
+  port.addEventListener('message', (msg: { data: RequestPayload }) => {
+    if (msg.data.type === 'conn') initConn(msg.data.path, port, msg.data.cookie);
+    if (msg.data.type === 'ack') ack[msg.data.id]();
+  });
+
+  port.start();
+};
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index c1d715c05..c5a04f4e4 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.39.19",
+  "version": "4.39.20",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
@@ -31,6 +31,7 @@
     "@types/qrcode": "^1.5.0",
     "@types/react-dom": "^18.0.6",
     "@types/redux-logger": "^3.0.9",
+    "@types/sharedworker": "^0.0.80",
     "@vscode/codicons": "^0.0.32",
     "autoprefixer": "^10.4.8",
     "browser-update": "^3.3.40",
@@ -104,6 +105,7 @@
     "through2": "^4.0.2",
     "timeago-react": "^3.0.5",
     "timeago.js": "^4.0.2",
+    "ts-loader": "^9.3.1",
     "vditor": "^3.8.17",
     "vinyl-buffer": "^1.0.1",
     "web-streams-polyfill": "^3.2.1",