No, the problem is during scrolling.

On Mon, Aug 29, 2022 at 9:03 AM Eli Zaretskii <eliz@gnu.org> wrote:

> > 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?
>


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