mmm I wanted to edit my post but it seems to get locked after time. So just adding a comment with some info and corrections on the topic.

- Atom on linux uses GTK+[0].

- GTK+ uses XLib[1].

- From the wikipedia link "Xlib makes the client synchronous with respect to replies and events." so much for js being async ;)

- Do anybody know how workable chrome or even firefox is over the x window protocol?

[0]: https://electron.atom.io/docs/development/build-instructions...

[1]: https://en.wikipedia.org/wiki/X_Window_System_core_protocol#...