I find Atom for Go very slow. It feels sluggish, startup time is slow. Sometimes scrolling is lagging, it uses tons of memory (> 1GB to edit 3 text files...).
I switched to Sublime from Atom recently after about 2 years and I'm happy.
I usually look a small repos so I haven't had this problem so far. I'll see how it goes as I continue to use it, but the plugins (go-plus) have already made a huge difference so far :o
