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

[Dmitry Gutov]

On 09.04.2020 22:46, Stefan Monnier wrote:
> Making (setq jit-lock-defer-time 0) check input-pending-p was
> a quick hack.  It worked well enough to be useful.
>
> I agree that it would be good to provide something better, which works
> harder at trying to make sure that jit-lock is skipped iff redisplay is
> skipped.

Considering the predicate is composite, its result changes over time, 
and jit-lock and redisplay happen not exactly at the same time, it seems 
difficult.

The approach taken by f-b-i-s originally seems easier to "make right". 
Not necessarily exactly like in my last patch, but maybe in that exact 
place in the code.