I created a new react native project with the latest react native version 0.60.3. But while running the project I found that my pc which runs on Ubuntu 18.0.4 got hanged at some point of time. I tried this several times but the result was the same for me.
The resulted hang was the direct consequence of increased RAM consumption. Even though my PC has got 8 GB RAM, it was not enough for the react native project to run smoothly. When I rushed to React Native GitHub issues, I found other users also facing the same issue as written here,
As of now, the only solution to fix this react native issue is to use some other versions of react native except 0.60.3 in your projects. I already have a blog post on creating react native project using specific react native version.