Why uwp apps take long time to start?

Question

Even an uwp app containing nothing but a button starts up slower than a wpf or winform app. Is there any reason behind it?? Is this because of uwp apps running in container that makes the start up process slow??

Answer 1

Emmm, it's the disadvantage of uwp, maybe ms team want to show how fast their code works. But we can do something to make it launch very fast in release mode.

First open Package.appxmanifest in text mode. Insert uap5 at the top of the file.

<Package
  ...
  xmlns:uap5="http://schemas.microsoft.com/appx/manifest/uap/windows10/5"
  IgnorableNamespaces="uap mp uap5"
  ...>

Then you need to find label SplashScreen.

<uap:SplashScreen ... uap5:Optional="true"/>

Finally, change to release mode, you will find your app is launching very quickly.