Re: Exposing buffer text modifications to Lisp

[Eli Zaretskii]

> From: Ihor Radchenko <yantar92@gmail.com>
> Cc: "Basil L. Contovounesios" <contovob@tcd.ie>,  casouri@gmail.com,
>   emacs-devel@gnu.org
> Date: Sat, 25 Jun 2022 12:54:36 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Btw, do we have recipes for measuring the effects of changing the data
> > structures used for markers?  If we do have such recipes, did someone
> > try to compare the performance in plain-ASCII Org buffers (where the
> > conversion is trivial and shouldn't even access the markers) and
> > non-ASCII buffers?  Inserting a single non-ASCII character somewhere
> > in an otherwise plain-ASCII buffer should show the effect of many
> > markers on the likes of CHAR_TO_BYTE.
> 
> AFAIK, buf_bytepos_to_charpos should take no time on plain-ASCII buffers

Yes, that's what I said above.

> The recipe of measuring the effects is in
> https://list.orgmode.org/orgmode/scedec$2g0$1@ciao.gmane.io/
> 
> That email literally provides Elisp code to run in order to measure the
> effect.

Thanks.  However, that Lisp includes Org code, and I wonder why is
that relevant and how it could affect the results.  Using regexp
search shouldn't need any Org code, and is quite simple to write, I
think.  The main problem is to find a recipe that puts many markers in
a buffer.  If this is what the Org code in that recipe is about, then
it's one situation where benchmarking ASCII vs non-ASCII buffers will
help.  Another use case is a buffer with a lot of overlays.