bug#14786: 24.3.50; `field-end' is now very slow

[Lars Ingebrigtsen <larsi@gnus.org>]

Drew Adams <drew.adams@oracle.com> writes:

>> > I put the cursor on, say, the first file or dir name in a large Dired
>> > buffer (1860 lines).  I do `M-: (field-end nil)'.
>> >
>> > In Emacs 22, 23, and even 24.3, the result appears immediately - no
>> > perceptible delay.  In recent Emacs 24 (e.g., this build), the result
>> > appears after several seconds - 3 to 4 sec.
>> 
>> I cannot reproduce this with yesterday's trunk.  Does this happen for
>> you in "emacs -Q"?
>
> Sorry, the description was incomplete.
>
> 1. emacs -Q
>
> 2. Load library dired-details.el, from Emacs Wiki:
> http://www.emacswiki.org/emacs/download/dired-details.el
>
> 3. C-x d ; in some directory that has lots of files
>
> 4.  M-x dired-details-toggle
>
> 5. M-x dired-details-toggle ; (optional, so you see all info)
>
> 6. Position the cursor on a file or dir name near the beginning of
> the list.
>
> 7. M-: (field-end nil)
>
> The result appears after a few seconds (I'm guessing about 4 sec
> in the directory I used).

I tried reproducing this in Emacs 27.2, but was unable to -- the
`(field-end nil)' was instantaneous for me.

Are you still seeing this issue in recent Emacs versions?

-- 
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   bloggy blog: http://lars.ingebrigtsen.no