Re: `make-overlay' very slow

[Lennart Borgman]

On Sat, Apr 11, 2009 at 9:45 AM, Werner LEMBERG <address@hidden> wrote:
>
>>> I did that (see attachment for reference), and it really works at a
>>> reasonable speed.  However, it is the completely wrong concept
>>> since it sets the `modified' flag and stores undo information,
>>
>> There is a macro in font-lock.el that you can use to modify text
>> properties without storing undo information or setting the modified
>> flag.
>
> Thanks, will update my code.  However, it isn't a general solution
> since my function should essentially work with all modes.

The macro does not depend on font-lock and you have to copy it to your code.