bug#56682: Fix the long lines font locking related slowdowns

[Stefan Monnier]

>>> The general idea is that syntax-ppss is currently an order of magnitude
>>> too slow for "too large" buffers.
>> And that it can be almost another order of magnitude worse in some major
>> modes because of `syntax-propertize`.
> That's possible, I don't know.  I might take a look at that later.  But note
> that your reactions are not exactly encouraging me to do so.

I don't see any need to look into it, so don't waste your time there,
because whether what I said above is true or not is mostly irrelevant
(e.g. what would you do with that info anyway?).


        Stefan