Switching tabs takes over a second, opening a folder takes over 5 seconds. It seems that much has been sped up by the react overhaul, but these basic things are still quite slow. This slowness is what you really start feeling throughout the day. Those seconds add up.
I know performance is very important to the Atom team, so this may just be a portion of the performance that hasn’t been addressed yet. But I didn’t see a thread specific to this issue for discussion/tracking so thought I would start one.