Re: Gap buffer problem?

[Gerd Möllmann]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Gerd Möllmann <gerd.moellmann@gmail.com>
>> Cc: emacs-devel@gnu.org,  ofv@wanadoo.es,  pipcet@protonmail.com
>> Date: Wed, 11 Dec 2024 16:51:56 +0100
>> 
>> Eli Zaretskii <eliz@gnu.org> writes:
>> 
>> > Unless you have a huge (and I mean a HUGE) buffer, and some Lisp that
>> > moves point, then inserts a small number of characters, then moves
>> > point far away and again inserts a small number of characters, etc.,
>> > I'd be very surprised if the gap buffer caused significant performance
>> > problems on a modern CPU.
>> >
>> > Can you profile that case and post the expanded profile?  I'm always
>> > happy to be wrong about performance bottlenecks, and profiles are good
>> > at proving me wrong.
>> 
>> Maybe I'll try to investigate that further at some point. Such things
>> always tend to be so time consuming...
>
> I meant profiling with "M-x profile-start", then run your slow-down
> recipe.  That should be easy and should not consume any significant
> time.  Analyzing the profile could, but producing it shouldn't.

Plus making it reproducible, if it is.