Re: Patch to avoid flicker in Isearch with lazy count

[Juri Linkov]

>> Definitely, ‘lazy-highlight-delay-max-chars’ should not affect
>> ‘lazy-highlight-interval’ because with pauses between highlighting
>> portions of matches, when lazy-highlight-buffer-max-at-a-time is 20,
>> this could create a situation when only first 20 matches are counted,
>> and during the delay before processing the next portion of matches,
>> the users might think this is the final total of all existing matches,
>> so this is misleading for users.
>
> Good, I'll make it so.  By the way, why is the default
> ‘lazy-highlight-buffer-max-at-a-time’ (20) so low?  The overhead of
> creating a timer for every 20 matches is pretty substantial.  On my
> machine, a value like 500 or 1000 makes the lazy count finish visibly
> faster, and doesn't affect responsiveness even in huge files.

For historical reasons, when computers were slow.  Maybe now it's time
to bump up the default value.