bug#15876: 24.3.50; Highly degraded performance between rev 114715 and 115006

[Eli Zaretskii]

> From: "Sebastien Vauban" <sva-news@mygooglest.com>
> Date: Wed, 20 Nov 2013 23:32:44 +0100
> 
> "Sebastien Vauban" wrote:
> > "Sebastien Vauban" wrote:
> >> Glenn Morris wrote:
> >>> "Sebastien Vauban" wrote:
> >>
> >> Though I don't use rev 115085 much because of those problems, I tried to 
> >> bite
> >> the bullet and worked a bit more with it.
> >>
> >>> If you think Emacs is generally slow, then please post a recipe starting
> >>> from emacs -Q that shows the problem, preferably not involving Org (since 
> >>> it
> >>> has many moving parts).
> >>
> >> I'll try to do that later today. But it seems it won't be obvious, as the
> >> only spots where I observed them are Org and Gnus, and I guess you'd like 
> >> not
> >> having any of these two enabled in the recipe.
> >
> > I don't have yet a minimized Emacs configuration file, but I already can 
> > tell
> > that, in my full .emacs file, disabling the following line does solve the
> > problem!
> >
> > ;; highlight trailing whitespaces in all modes
> > (setq-default show-trailing-whitespace t)
> >
> > So, it seems to conflict with something else from my .emacs -- still have to
> > find what.
> 
> The following item that makes the problem happen (or not, depending whether
> commented out) is:
> 
> --8<---------------cut here---------------start------------->8---
>   ;; ellipsis to use in the Org mode outline
>   (setq org-ellipsis " \u25B7") ; white triangle
> --8<---------------cut here---------------end--------------->8---

So what is the minimum .emacs that will cause the problem?