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

[Eli Zaretskii]

> Cc: Eli Zaretskii <address@hidden>, address@hidden, address@hidden,
>  address@hidden, address@hidden, address@hidden
> From: Dmitry Gutov <address@hidden>
> Date: Thu, 9 Apr 2020 22:30:05 +0300
> 
> So thus far fast-but-imprecise-scrolling seems to provide better 
> behavior.

Not here, it isn't.  Scrolling gets stuck very often and for prolonged
times in an unoptimized build.  In an optimized build, it gets stuck
less often, but the scrolling is significantly slower than with
jit-lock-defer-time set to 0.1.

Did you try fast-but-imprecise-scrolling in an optimized build or in
an unoptimized one?