[Adutude]

From the atom FAQ in answer to the question "Atom feels slow or is consuming too much CPU or memory"

"Atom isn’t designed to be a tiny native-code editor. If the ultimate in speed is what you’re after, Atom probably isn’t what you’re looking for at least for now … and possibly not ever depending on what you’re expecting."

I tried Atom as an alternative to Eclipse, about 3 months back, as I consider Eclipse to be pretty bloated and slow, but Atom made Eclipse look like a speed demon. I tried running with --safe, removing plugins, but nothing seemed to help, it was still painfully slow. Perhaps it's my machine or some other local issue, but I run Eclipse with lots of plugins and it runs great, in comparison.

After reading the above in the FAQ and many many posts about how Atom was running slow and the responses those issues received, it seemed to me like they actually do admit there are performance problems but have the attitude of "That's just how it works, if you don't like it use something else"