Re: A question about overlays and performance.

[Ihor Radchenko]

> So what kind of guidelines did you want to hear regarding these
> issues?

Mostly wanted to know if there is a known way to solve these issues.
If there is, it may be a good idea to describe it briefly in the manual.
If not, I was thinking about writing a patch/feature request to solve
these issues.

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Ihor Radchenko <yantar92@gmail.com>
>> Cc: emacs-devel@gnu.org
>> Date: Sun, 26 Jul 2020 09:33:21 +0800
>> 
>> Not directly related to the initial question here, but may I ask if
>> there are any practical guidelines to convert overlays to text
>> properties? I am specifically concerned about two issues when we want to
>> use text properties instead of overlays to hide text in buffer (pointing
>> at org-mode):
>> - text hidden via text properties is not well-handled by isearch. For
>>   overlays, isearch can temporary reveal the hidden text, which is not
>>   the case for text hidden using 'invisible text property.
>> - text properties are not buffer-local in indirect buffers. With
>>   overlays, it is possible to have define hidden text in basic and
>>   indirect buffer independently. However, text properties will always be
>>   shared and the text hidden in indirect buffer will automatically be
>>   hidden in the base buffer as well.
>
> So what kind of guidelines did you want to hear regarding these
> issues?

-- 
Ihor Radchenko,
PhD,
Center for Advancing Materials Performance from the Nanoscale (CAMP-nano)
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong 
University, Xi'an, China
Email: yantar92@gmail.com, ihor_radchenko@alumni.sutd.edu.sg