Re: Radio links work only in small numbers

[Ihor Radchenko <yantar92@posteo.net>]

Noboru Ota <me@nobiot.com> writes:

>> You need Www.
>> The attached version of the patch should work for 5000-terms.org.
>
> Thank you, Ihor. With your advice, I have managed to apply the patch. It
> works for 5000 terms! Thank you.

Thanks for testing!
Applied, onto main.
https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=341a01a07
Fixed.

> Some observations:
>
> - Running `org-update-radio-target-regexp` takes about 15 seconds for the
>   file[1].

This is expected. By splitting radio target regexp into multiple
regexps, we increase the number of regexp search invocations. Regexp
search is relatively costly in Emacs.

>> (I had to scale down the maximum allowed regexp size; apparently,
>> the number from C sources was not small enough).
>
> Do you have any indication on how many would be maximum?

See the docstring of `org-target-link-regexp-limit'.
The hard limit is MAX_BUF_SIZE in src/regex-emacs.c, but that's after
the regexp is compiled (AFAIU). So, the real limit is smaller and may
depend on regexp complexity.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
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