I keep my Visual Studio and Xamarin fully updated.
After the last Visual Studio update (I'm running 2017 v 15.9.6), UWP apps take forever to launch! (building is still quick)
It went from a few seconds to about a minute.
As each dll is loaded, there is a long pause. They used to just fly ...
'MyApp.UWP.exe' (CoreCLR: CoreCLR_UWP_Domain): Loaded 'C:\Projects\MyApp\MyApp.UWP\bin\x86\Debug\AppX\entrypoint\MyApp.UWP.exe'. Symbols loaded. 'MyApp.UWP.exe' (CoreCLR: CoreCLR_UWP_Domain): Loaded 'C:\Projects\MyApp\MyApp.UWP\bin\x86\Debug\AppX\entrypoint\System.Runtime.dll'. Symbols loaded.