It looks like this is a know issue, and looking at the notes, would appears to be Atom scanning all files for GIT status. We are currently not using GIT on any of the files we’re editting.
It appears there isn’t a way of switching this scan feature off … which is a surprise, other than Atom wanting all to use GIT for all files.
Do you have any plans to allow this to be switched off ?
Other than this speed issue I think Atom is excellent.