From bba50c842717631c3f7fdc8644c16bc577019583 Mon Sep 17 00:00:00 2001
From: Josh Perez <60019601+josh-signal@users.noreply.github.com>
Date: Fri, 15 Jan 2021 12:30:58 -0500
Subject: [PATCH] Log app startup time

---
 main.js          | 8 ++++++++
 preload.js       | 2 ++
 ts/background.ts | 2 +-
 ts/window.d.ts   | 1 +
 4 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/main.js b/main.js
index 595b166f45..259e46099e 100644
--- a/main.js
+++ b/main.js
@@ -866,6 +866,14 @@ function showPermissionsPopupWindow(forCalling, forCamera) {
 // Some APIs can only be used after this event occurs.
 let ready = false;
 app.on('ready', async () => {
+  const startTime = Date.now();
+
+  // We use this event only a single time to log the startup time of the app
+  // from when it's first ready until the loading screen disappears.
+  ipc.once('signal-app-loaded', () => {
+    console.log('App has finished loading in:', Date.now() - startTime);
+  });
+
   const userDataPath = await getRealPath(app.getPath('userData'));
   const installPath = await getRealPath(app.getAppPath());
 
diff --git a/preload.js b/preload.js
index 1b5b14e6c9..6b308ccffd 100644
--- a/preload.js
+++ b/preload.js
@@ -97,6 +97,8 @@ try {
 
   window.setBadgeCount = count => ipc.send('set-badge-count', count);
 
+  window.logAppLoadedEvent = () => ipc.send('signal-app-loaded');
+
   // We never do these in our code, so we'll prevent it everywhere
   window.open = () => null;
   // eslint-disable-next-line no-eval, no-multi-assign
diff --git a/ts/background.ts b/ts/background.ts
index 2776eb7c3f..ef70b3652b 100644
--- a/ts/background.ts
+++ b/ts/background.ts
@@ -2118,7 +2118,6 @@ type WhatIsThis = import('./window.d').WhatIsThis;
     ]);
     window.log.info('onEmpty: All outstanding database requests complete');
     initialLoadComplete = true;
-
     window.readyForUpdates();
 
     // Start listeners here, after we get through our queue.
@@ -2140,6 +2139,7 @@ type WhatIsThis = import('./window.d').WhatIsThis;
         clearInterval(interval!);
         interval = null;
         view.onEmpty();
+        window.logAppLoadedEvent();
       }
     }, 500);
 
diff --git a/ts/window.d.ts b/ts/window.d.ts
index 342abde5d9..de4732dd4b 100644
--- a/ts/window.d.ts
+++ b/ts/window.d.ts
@@ -493,6 +493,7 @@ declare global {
     hasSignalAccount: (number: string) => boolean;
     getServerTrustRoot: () => WhatIsThis;
     readyForUpdates: () => void;
+    logAppLoadedEvent: () => void;
 
     // Flags
     isGroupCallingEnabled: () => boolean;