Does React Native perform Tree Shaking?

Question

I am trying to weigh up the benefits of converting moment to date-fns.

Moment is currently 316k or 67.6k gzipped.

Answer 1

react-native or more specifically, the metro-bundler that comes with react-native by default doesn't yet support tree-shaking!

According to comments in the following link, it's supposed to be implemented in the first half of this year (2019!).

Source: https://github.com/facebook/metro/issues/227