bug#61814: [RFC] Asynchronous, jit-lock-based Flyspell

[Yuan Fu]

> On Mar 6, 2023, at 2:52 AM, Augusto Stoffel <arstoffel@gmail.com> wrote:
> 
> On Sat,  4 Mar 2023 at 14:59, Yuan Fu wrote:
> 
>> wucuo.el also caused an issue when I opened a buffer with some inline
>> images. The inline image is the raw image data encoded in base64
>> inserted into the file as a string, plus a display text property over
>> the whole string displaying it as the image. wucuo.el thinks that huge
>> string is visible in the window (because of the display text
>> property), and tries to spell check that huge string, and got stuck.
> 
> wucuo.el seems to be synchronous like Flyspell, so that sounds like a
> big problem.
> 
> Anyway, which major mode does that?  AFAIK the usual is to have the
> underlying text of an image just a space or something similar.
> 
>> I wonder if it’s possible or desirable to follow the flyspell’s
>> behavior but make it async? Preferably when some mechanism to discard
>> unnecessary spell checks. For example, I modified my scrolling
>> functions to inhibit flyspell from running in post-command-hook, which
>> speeds up scrolling considerably. Otherwise flyspell would try to
>> spell check every word you scrolled by and cause perceivable
>> slow-down.
> 
> It sure is possible, but not something I would be interested in doing.
> jit-spell shouldn't suffer from the issue you described.

Great!

Yuan