Thanks for the answer and the welcoming.
I've been doing some reading and further testing to evaluate NativeScript. As I mentioned, I've been developing Titanium for a long time - so this is my comparison base - I've been working with Titanium since it's performance were very bad, and saw how they improve little by little (partly thanks to tweaks such as the one I mentioned I think).
So I've been reading about NativeScript and saw people are having some issues with boot time, navigation speed and app size. And mainly apps built with Angular - so this kinda worries me, since one of the things I liked most about NS is Angular - but not at the price of performance.
Also, I noticed that the apps executable, once compiled takes is a pretty big file size. For a HelloWorld vanilla app android is about 13mb while iOS is 63mb. If you add 30mb Angular to the mix it gets a lot bigger - and that's just Hello World.
BTW - there is another young platform called Fuse that took this a step further - the Fuse compiler compiles the XML UI elements to c++ code for the performance gain. So that's why I think this is a big issue.
Would love to understand the architecture better, and if there are benchmarks for those things would love to see them as well