> Is it?

It is. None of what you write is either fast or efficient. Especially not the layout engine that does a re-layout and a re-paint as soon as you look at it sideways

I always say when people talk about efficiency: There's a reason you can't animate height: auto or a list item efficiently without hacks. As is the reason why opacity changes are outright banned on lower-end devices like TVs.

The limitations of this system designed to display static text are such that a non-issue like quickly displaying scrolling text becomes a problem: https://code.visualstudio.com/blogs/2017/10/03/terminal-rend...