bug#42406: Mouse-wheel scrolling can be flickering

[Eli Zaretskii]

> From: Konrad Podczeck <konrad.podczeck@univie.ac.at>
> Date: Thu, 17 Dec 2020 17:40:30 +0100
> Cc: Eli Zaretskii <eliz@gnu.org>,
>  Alan Third <alan@idiocy.org>,
>  42406@debbugs.gnu.org
> 
> Let me reply that,  with the three critical instances of  
> wset_updated_mode_line just out-commented, when I scroll in a frame _with_ 
> input focus, then the mode line is always correctly updated. If I scroll in a 
> frame without input focus, then at least the percentage is always updated, 
> and the line-number is update as soon as the (hollow) cursor reaches the top 
> or the bottom of the range of text shown in the frame. In any case, with 
> global-line-numbers-mode on, is there a situation where, in practice,  one 
> needs to look at the line numbers as shown in the mode line?

Only you can answer that question, because only you know what is and
isn't important on display for your use patterns.