From: "João Távora" <joaotavora@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Stefan Monnier <monnier@iro.umontreal.ca>,
emacs-devel <emacs-devel@gnu.org>
Subject: Re: jit-lock-antiblink-grace
Date: Tue, 15 Oct 2019 19:28:25 +0100 [thread overview]
Message-ID: <CALDnm50BFThFg6jsETPEoYc9SqcBfJcm1oBo2rKpX=c=mQL8oA@mail.gmail.com> (raw)
In-Reply-To: <83sgnuh5cq.fsf@gnu.org>
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On Tue, Oct 15, 2019 at 7:48 AM Eli Zaretskii <eliz@gnu.org> wrote:
>
> This is encouraging, but please try C-n near the end of xdisp.c, so
> that it includes syms_of_xdisp. The first 350 lines of xdisp.c is one
> large comment, and there's a very small number of strings after that.
OK. So same setup as before but running on Windows 10 on a i7
processor:
30 seconds from syms_of_xdisp (void) in src/xdisp.c:
with antiblink: 34969, around 7% load measured by Process Explorer
without: 34977, also around 7% load
So I'd venture to say this didn't change much.
I think the reason the C-n and C-v tests escape a big performance hit is
that the potentially expensive operation, 'syntax-ppss', doesn't get
called when you you have switched lines. So the presence or absence of
strings is irrelevant. The most expensive operation will probably be
`line-beginning-position` which is in C and apparently fast enough to
not have any kind of relative impact.
But now that I notice, the beginning of jit-lock--antiblink-post-command
could be improved slightly to shortcut earlier and avoid one extra
`line-beginning-position' call in these cases (though probably these
rough benchmarks wouldn't show it.)
So to summarize, for the "paging" scenario, the overhead of the
post-command-based antiblink can be as low a 'copy-marker', an argless
'line-beginning-position' and few tests.
Assuming you're OK with the performace aspects of the thing, I'll do the
fixes you suggested earlier and re-submit (or push?)
João
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next prev parent reply other threads:[~2019-10-15 18:28 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-10 22:34 jit-lock-antiblink-grace João Távora
2019-10-11 14:26 ` jit-lock-antiblink-grace Stefan Monnier
2019-10-12 9:34 ` jit-lock-antiblink-grace Eli Zaretskii
2019-10-12 10:57 ` jit-lock-antiblink-grace João Távora
2019-10-12 13:02 ` jit-lock-antiblink-grace Juanma Barranquero
2019-10-12 13:14 ` jit-lock-antiblink-grace João Távora
2019-10-12 14:50 ` jit-lock-antiblink-grace Juanma Barranquero
2019-10-12 15:11 ` jit-lock-antiblink-grace João Távora
2019-10-12 15:30 ` jit-lock-antiblink-grace Juanma Barranquero
2019-10-12 13:32 ` jit-lock-antiblink-grace Eli Zaretskii
2019-10-12 14:13 ` jit-lock-antiblink-grace Stefan Monnier
2019-10-12 14:23 ` jit-lock-antiblink-grace Eli Zaretskii
2019-10-12 14:34 ` jit-lock-antiblink-grace Stefan Monnier
2019-10-12 15:57 ` jit-lock-antiblink-grace Eli Zaretskii
2019-10-12 17:16 ` jit-lock-antiblink-grace Stefan Monnier
2019-10-12 17:50 ` jit-lock-antiblink-grace Eli Zaretskii
2019-10-12 15:47 ` jit-lock-antiblink-grace Alan Mackenzie
2019-10-12 14:23 ` jit-lock-antiblink-grace João Távora
2019-10-12 16:04 ` jit-lock-antiblink-grace Eli Zaretskii
2019-10-12 21:55 ` jit-lock-antiblink-grace João Távora
2019-10-13 6:39 ` jit-lock-antiblink-grace Eli Zaretskii
2019-10-13 8:47 ` jit-lock-antiblink-grace João Távora
2019-10-13 9:22 ` jit-lock-antiblink-grace Eli Zaretskii
2019-10-13 10:28 ` jit-lock-antiblink-grace João Távora
2019-10-13 10:45 ` jit-lock-antiblink-grace Eli Zaretskii
2019-10-14 23:29 ` jit-lock-antiblink-grace João Távora
2019-10-15 6:48 ` jit-lock-antiblink-grace Eli Zaretskii
2019-10-15 18:28 ` João Távora [this message]
2019-11-24 1:04 ` jit-lock-antiblink-grace João Távora
2019-11-24 16:16 ` jit-lock-antiblink-grace Eli Zaretskii
2019-11-25 18:46 ` jit-lock-antiblink-grace Alan Mackenzie
2019-11-25 19:02 ` jit-lock-antiblink-grace João Távora
2019-11-25 19:26 ` jit-lock-antiblink-grace Alan Mackenzie
2019-11-25 19:45 ` jit-lock-antiblink-grace João Távora
2019-11-25 20:11 ` jit-lock-antiblink-grace Alan Mackenzie
2019-11-25 20:23 ` jit-lock-antiblink-grace João Távora
2019-11-25 21:07 ` jit-lock-antiblink-grace João Távora
2019-11-26 2:30 ` jit-lock-antiblink-grace João Távora
2019-11-26 17:58 ` jit-lock-antiblink-grace Eli Zaretskii
2019-11-30 19:11 ` jit-lock-antiblink-grace João Távora
2019-11-30 19:22 ` jit-lock-antiblink-grace Eli Zaretskii
2019-11-30 20:12 ` jit-lock-antiblink-grace João Távora
2019-11-30 20:16 ` jit-lock-antiblink-grace Eli Zaretskii
2019-11-30 20:19 ` jit-lock-antiblink-grace João Távora
2019-11-30 20:41 ` jit-lock-antiblink-grace Eli Zaretskii
2019-11-30 22:00 ` jit-lock-antiblink-grace João Távora
2019-12-01 18:13 ` jit-lock-antiblink-grace Eli Zaretskii
2019-12-04 22:45 ` jit-lock-antiblink-grace João Távora
2019-12-05 15:40 ` jit-lock-antiblink-grace Eli Zaretskii
2019-11-26 13:43 ` jit-lock-antiblink-grace Stefan Monnier
2019-11-25 19:47 ` jit-lock-antiblink-grace Dmitry Gutov
2019-11-25 20:03 ` jit-lock-antiblink-grace João Távora
2019-10-12 16:14 ` jit-lock-antiblink-grace Alan Mackenzie
2019-10-12 22:26 ` jit-lock-antiblink-grace João Távora
2019-10-13 10:18 ` jit-lock-antiblink-grace Alan Mackenzie
2019-10-13 10:48 ` jit-lock-antiblink-grace João Távora
2019-10-13 12:02 ` jit-lock-antiblink-grace Alan Mackenzie
2019-10-13 19:57 ` jit-lock-antiblink-grace João Távora
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