bug#63225: Compiling regexp patterns (and REGEXP_CACHE_SIZE in search.c)

[Ihor Radchenko <yantar92@posteo.net>]

Mattias Engdegård <mattias.engdegard@gmail.com> writes:

> 9 maj 2023 kl. 14.02 skrev Ihor Radchenko <yantar92@posteo.net>:
>
>> - forward-line + skip-chars-forward      :: (2.980 2 0.648)
>> - beginning-of-line + looking-at-p       :: (7.189 2 0.653)
>> - beginning-of-line + skip-chars-forward :: (6.833 2 0.634)
>> - forward-line + looking-at-p            :: (3.180 2 0.663)
>
> You may want to try the small improvement to skip-chars-forward that just arrived on master.

I did not get anything meaningful here. Likely because my benchmark is
not very stable (the above results did not stay the same for different
Emacs session for example, except relative numbers).

[in the same order]
(4.171 2 0.420)
(6.740 2 0.419)
(5.977 1 0.210)
(4.262 2 0.431)

>> May you elaborate what is the blocker then?
>
> Mostly time, but also coming up with a design that is compatible and reasonably future-safe, and convincing people that it's a good way forward (assuming it actually is). Emacs is a collaborative effort, after all.

Then it is not a blocker, but rather "let's discuss it first in a
dedicated, clearly marked thread".

-- 
Ihor Radchenko // yantar92,
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