router-outlet > page-router-outlet - navigating back from pushed view on the nav stack, takes awhile for view to render/display

[NathanWalker]

When using the router-outlet as the base router outlet in the side drawer setup and using a page-router-outlet to push detail views onto, there is a significant delay when rendering the router-outlet view when navigating back from a pushed detail view.

You can observe this behavior when going to Playlists in menu, then choose a playlist to view the tracks, then choose 'Back' up top to go back to previous view. Notice the Playlists views you navigated back to will take a moment to render and display. This either related to RadListView or to the way router-outlet is saving a component instance and showing it again when navigating back.

/cc @vakrilov would love your insight here.

[vakrilov]

Probably need some more profiling, but to set things straight:

• <page-router-outlate> - does caching of components.
• <router-outlet> - uses the default angular behavior. Components are not cached - they are recreated each time.