Why do some android apps open so fast?

Question

Android

The application that generates Android Stuido if you select the "Empty activity" template starts in 850-950 ms:

2021-07-20 21:28:17.750 1321-1344/? I/ActivityTaskManager: Displayed com.tutaf.emptyapp/.MainActivity: +956ms

For comparison:

• Telegram X: 400-500ms
  
• Firefox: 550-1100ms
  
• VLC: 700-900ms
  
• w3bsit3-dns.com: 400-600 ms
  
• Total Commander: 600-800ms
  

If you clear the cache and stop the application before checking, then Firefox and VLC start slower than an empty application, but Telegram X, w3bsit3-dns.com and Total Commander start either in the same time or faster. Why do these applications launch faster and how can you get closer to their result?

Answer 1

Understood. If you build a release apk, then the application starts faster

2021-07-21 09:54:50.961 1321-1344/? I/ActivityTaskManager: Displayed com.tutaf.emptyapp/.MainActivity: +479ms