Re: Scrolling commands and skipping redisplay, was: Re: emacs rendering comparisson between emacs23 and emacs26.3

[Eli Zaretskii]

> Cc: address@hidden, address@hidden, address@hidden, address@hidden,
>  address@hidden
> From: Dmitry Gutov <address@hidden>
> Date: Thu, 16 Apr 2020 05:18:54 +0300
> 
> On 12.04.2020 10:10, Eli Zaretskii wrote:
> > I cannot imagine why would we want to exempt only the scrolling
> > commands from the input_was_pending trick.
> 
> Scrolling is certainly special at least in some way:
> 
> - Implementation-wise, not all commands simulate redisplay during their 
> operation.

I think you will find that many more do than you seem to assume.  Even
just redisplaying a window does this in many cases (to find the proper
place for window-start position).  C-n and C-p do as well.  And when
scroll-conservatively is in effect, almost every command that moves
point does.