bug#22090: Isearch is sluggish and eventually refuses further service with "[Too many words]".

[Alan Mackenzie]

Hello, Artur.

In article <mailman.1363.1449242229.31583.bug-gnu-emacs@gnu.org> you wrote:
> 2015-12-04 9:23 GMT+00:00 Eli Zaretskii <eliz@gnu.org>:
>>> Date: Fri, 4 Dec 2015 04:20:52 +0000
>>> From: Alan Mackenzie <acm@muc.de>
>>>
>>> With a recent emacs-25 (last update
>>> eaa1fd6dbff8346eb38485de5ebf0fbfacf374d9 from Thursday 2015-12-03):
>>>
>>> emacs -Q
>>> C-c C-f src/xdisp.c
>>> Move point to L30 (paragraph beginning "Updating the display is triggered
>>>   by the Lisp interpreter ...")
>>>
>>> C-s
>>> C-w repeatedly, to yank words onto the search string.
>>>
>>> After ~29 words have been yanked, the response becomes sluggish, pausing
>>> for between 0.5s and 1s before highlighting the "for" at the end of L31.

> Thanks for the report. The source for this (and for a similar bug
> mentioned on a thread in emacs-devel) was the code I had added for
> special case-folding support.
> For now, I've just removed the code. I can think of a way of solving
> this, but it adds some complexity to isearch, which I don't wanna do
> (and I don't think this feature was that important anyway). Here's a
> full copy of the commit message explaining why the bug happens.

Thanks for reacting to this so quickly.  I confirm that both symptoms of
the bug have been resolved.

So I'm closing this bug.

[ .... ]

-- 
Alan Mackenzie (Nuremberg, Germany).