bug#57434: 28.1.91; Terminal Emacs Mac OS flickering.

[Eli Zaretskii]

> From: Dmitrii Kuragin <kuragin@google.com>
> Date: Mon, 29 Aug 2022 07:38:48 -0700
> Cc: Gerd Möllmann <gerd.moellmann@gmail.com>, 
>       57434@debbugs.gnu.org
> 
> Do we actually need to redraw the whole line if we use relative numbers or we 
> can just redraw the portion with
> line numbers?

We need to redraw only the parts that have actually changed.

But even with relative line numbers, the numbers only change if you
move the cursor vertically.  I thought you've seen flickering even
when cursor doesn't move at all, and Emacs is completely idle.  isn't
that so?