Today my mentor recommended that I give Atom another shot. I had previously tried Atom on my own and loved it, but it quickly started to blow up my CPU, often hitting 90%+. I had searched for a fix before, but no answers turned up. But today, that changed.
Just recently an answer to my prayers was posted here. To fix the high CPU usage problem, simply press cmd+shift+p and type ‘package’ to get to the package management screen. Search for ‘git’ and disable both git-diff and github.