Performance - Tabs and Angular watches

Let’s imagine a scenario where we have 100 of tabs. If we create a view with double binding, will Angular create watches for all 100 tabs?

If Ionic doesn’t do anything about it (which is quite reasonable approach) what would you recommend as the best way forward to have watches only on the current tab?

I am planning to create single bound variables in all tabs and apply a custom watch to an active tab. Would that work?