Report more performance stats

ts/background.ts

@@ -2117,7 +2117,9 @@ export async function startApp(): Promise<void> {
     // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
     view.onEmpty();
 
-    window.logAppLoadedEvent();
+    window.logAppLoadedEvent({
+      processedCount: messageReceiver && messageReceiver.getProcessedCount(),
+    });
     if (messageReceiver) {
       window.log.info(
         'App loaded - messages:',

ts/textsecure/MessageReceiver.ts

@@ -332,6 +332,7 @@ class MessageReceiverInner extends EventTarget {
 
   onopen() {
     window.log.info('websocket open');
+    window.logMessageReceiverConnect();
   }
 
   onerror() {

ts/window.d.ts

@@ -545,7 +545,8 @@ declare global {
     hasSignalAccount: (number: string) => boolean;
     getServerTrustRoot: () => WhatIsThis;
     readyForUpdates: () => void;
-    logAppLoadedEvent: () => void;
+    logAppLoadedEvent: (options: { processedCount?: number }) => void;
+    logMessageReceiverConnect: () => void;
 
     // Runtime Flags
     isShowingModal?: boolean;