One thing I found extremely slow for instance was copy and pasting of large chunks of text, but that's something I only experienced while testing Atom's performance. For my common text manipulation, I've never experienced the slowness that keeps so many from using Atom. I understand that people are bothered by this, but saying "Atom is slow" imho makes Atom appear as this giant unsuably sluggish piece of software that it is not.
- Text editors are not that complex (even with plugin systems they are not doing HPC work).
- Text editors were not perceived as slow many years ago.
- Our computers have only got faster (10000x range).
- It is 2015 and a text editor is slow (sub-second delays in GUI, large file limits, etc).
- There are text editors not written in JS/Webkit that are not slow by orders of magnitude.
While I'm not bothered by Atom being slowish, I think there is some basis for dissatisfaction here. Of course, nobody is obligated to use Atom.