We used Angular inside Ionic for an iOS app. Performance is OK, but I can't tell you if a different JS framework would be faster, or if it's a device/Ionic limitation. The main problem has been with rendering large sets of data (say 100+ items) in a scrolling list.

It's blazing fast. IMO React is more widely adopted, because it's been production ready for longer and because of the whole Angular PR debacle.

Once the platform development settles down (v2 -> v4 anyone?), I think it'll be the clear option for enterprise level development.

horribly.