For Emacs, you should consider using Emacsclient and server. That way it's always on in the background, takes a fraction of a second to open a new window and sh

For Emacs, you should consider using Emacsclient and server. That way it's always on in the background, takes a fraction of a second to open a new window and shares state between all the different windows. Additionally, it lets you configure programs that use an external editor, like Git, to just open a new buffer in your current Emacs session, which is very convenient.