Re: emacs rendering comparisson between emacs23 and emacs26.3

[Stefan Monnier]

>   > Recent Emacsen either ignore that variable or silently reset it to nil
>   > internally so it doesn't get into their way.  Their progmodes either
>   > always scan an entire buffer from its beginning or use some elaborate,
>   > fragile techniques to find such a top level position.  Moreover, our
>   > underlying mechanism for syntax highlighting always marks the entire
>   > rest of a buffer as dirty after every single editing change.  This has
>   > the consequence that that entire part has to be continuously rescanned
>   > when some of it is shown in another window.
>
> Does anyone disagree with this specific factual claim?

There are several claims above which can be interpreted in many
different ways, some of them correspond to reality but many others
don't.  So if you don't know the actual facts behind the above claims
you're likely to infer incorrect conclusions.

>   > The basic slowness of Emacs over the past years is a direct consequence
>   > of that policy.
> Does anyone disagree with this general claim?

I think I made it clear that I do.


        Stefan