Is possible to avoid slow startup time of xf app on Android in this way?

I made a big xamarin form app for ios and android, all is working great, but on Android app take till 8 seconds to starts.
I already try to use XAML Compilation and AOT...the AOT gain 2seconds, but it double the size of my apk, so is not a solution for my needs.

My question:
If I try to:
- rewrote only the first page in xamarin android
- start the app in native way
- while first view is shown, init the xamarin form engine (using callback, timers or in other async way) and after the init use only xf page
the startup time for my xamarin android app should be better?

Thanks for answer
Matteo