I had this with the ternjs plugin. Out of the box atom is pretty snappy on OS X. I haven't used Windows in a decade but I often see comparisons to Visual Studio

I had this with the ternjs plugin. Out of the box atom is pretty snappy on OS X. I haven't used Windows in a decade but I often see comparisons to Visual Studio accompanying complaints about Atom so my best guess is that it's either due to environment or a heavy plugin.