Re: Processing speed in large C++ raw strings.

[Tadeus Prastowo]

Hi Alan,

On Sat, Apr 27, 2019 at 7:29 PM Alan Mackenzie <address@hidden> wrote:
>
> Hello again, Tadeus.
>
> On Sat, Apr 27, 2019 at 17:35:16 +0200, Tadeus Prastowo wrote:
> > Hi Alan,
>
> > On Sat, Apr 27, 2019 at 1:37 PM Alan Mackenzie <address@hidden> wrote:
> > > The following patch should speed up the scrolling operation markedly.
> > > It does not become instantaneous, but takes a fraction of a second,
> > > compared with the several seconds it has taken up to now.  Would you
> > > please try it out.
>
> > I apply the following patch to master at commit
> > 8dc00b2f1e6523c634df3e24379afbe712a32b27, and I confirm that the
> > following patch works to solve not only the buffer scrolling
> > sluggishness but also the template parameter editing sluggishness,
> > including the one that I sent to Stefan earlier today.  Thank you very
> > much, Alan, I really appreciate it.  Three lines of a diff to solve my
> > two-year old sluggishness problem.
>
> Thanks indeed!  Thanks also for such a rapid reply.
>
> I've just committed the patch to all the usual places (including the
> Emacs master branch).  So I think the bug is now fixed.

I am currently experiencing some sluggishness in the following way
using `emacs -Q' that locally visits the file at
http://git.savannah.nongnu.org/cgit/tice.git/plain/internals/v1/v1_internals_program.hpp?id=6ed1f0b6d977eccf91386ead562e10e6801e95aa:

M-g g 2874
C-u 17 M-f
M-DEL remaining (this should be a bit sluggish)
M-d M-d M-DEL source_node_ids (this is sluggish)

Would you kindly see if you experience the same thing, please?  If so,
would it be easy to fix?  Thank you.

> > > diff -r 1940f96b9799 cc-engine.el
> > > --- a/cc-engine.el      Fri Apr 26 01:01:07 2019 +0000
> > > +++ b/cc-engine.el      Sat Apr 27 11:30:06 2019 +0000
> > > @@ -5539,7 +5539,9 @@
> > >                       (prog1 (looking-at "\\s(")
> > >                         (forward-char))))
> > >           (backward-char)
> > > -         (if (c-forward-<>-arglist nil) ; Should always work.
> > > +         (if (let ((c-parse-and-markup-<>-arglists t)
> > > +                   (c-restricted-<>-arglists t))
> > > +               (c-forward-<>-arglist nil)) ; Should always work.
> > >               (when (> (point) to)
> > >                 (setq bound-<> (point)))
> > >             (forward-char)))

> --
> Alan Mackenzie (Nuremberg, Germany).

-- 
Best regards,
Tadeus