bug#56682: feature/improved-locked-narrowing 9dee6df39c: Reworked locked narrowing.

[Dmitry Gutov]

On 31/01/2023 17:17, Gregory Heytings wrote:
> > note that a significant part of the redisplay slowdowns wasn't caused 
> > by font-lock, and thus the removal of locking will not regress those 
> > performance improvements.
>
> That is correct.
>
> > And for those (potential?) cases where font-lock is a real problem for 
> > performance, we could stop it from widening using an existing knob.
>
> That is not correct.  There is no knob that can prevent a mode from 
> widening.

Just the existing convention which implores modes not to do that.

CC Mode will continue to do what it does, I guess.