I was very pro-Atom for a while. I've since packed up and moved to Vim and then on to Emacs with evil-mode. I never had any performance complaints while I was

I was very pro-Atom for a while. I've since packed up and moved to Vim and then on to Emacs with evil-mode. I never had any performance complaints while I was actually using Atom, but a while back I made a mistake when generating a text file that turned out to be ~1.5GB. Luckily, it was just one mistake in the footer, so I could take care of it without regenerating the entire thing. Without even thinking about it, I opened it up with Emacs, went to the bottom, made my changes, and got back out. About a minute later, I saw how large of a file it was and was suddenly even more impressed with Emacs than I had been. Just for fun, I then tried to edit it with Atom. Nope.