From: Matt Armstrong <matt@rfc20.org>
To: "Gerd Möllmann" <gerd.moellmann@gmail.com>,
"Stefan Monnier" <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: noverlay branch
Date: Thu, 06 Oct 2022 21:11:01 -0700 [thread overview]
Message-ID: <87edvki88a.fsf@rfc20.org> (raw)
In-Reply-To: <af4a1ba8-b674-6bac-c440-77560f0748f9@gmail.com>
Gerd Möllmann <gerd.moellmann@gmail.com> writes:
> On 22-10-06 6:47 , Matt Armstrong wrote:
>
>> I see you removed some of the null->parent trick just today. I like
>> that idea. It is realtively easy to use actual NULL instead of a
>> sentinel NULL in tree algorithms, and I think on modern processors this
>> works out for the better.
>
> Clang libstd++ uses NULL, BTW, and I already wondered a little bit why.
I believe GNU libstdc++ does not use sentinel nodes either. I have yet
to see see sentinel nodes used in an optimized tree implementation.
I think in the context of this overlay work the performance difference
is not very significant, since the code is doing a lot of other stuff
while traversing the tree.
next prev parent reply other threads:[~2022-10-07 4:11 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-25 22:38 noverlay branch Stefan Monnier
2022-09-25 22:50 ` Lars Ingebrigtsen
2022-09-25 22:56 ` Stefan Monnier
2022-09-26 2:52 ` Ihor Radchenko
2022-09-26 3:17 ` Stefan Monnier
2022-09-26 6:11 ` Eli Zaretskii
2022-09-26 13:08 ` Ihor Radchenko
2022-09-26 15:59 ` Eli Zaretskii
[not found] ` <87v8ovdosz.fsf@localhost>
2022-10-08 6:57 ` Eli Zaretskii
2022-10-09 3:25 ` Matt Armstrong
2022-10-09 4:30 ` Eli Zaretskii
2022-10-09 3:23 ` Matt Armstrong
2022-10-09 3:47 ` Stefan Monnier
2022-10-13 12:09 ` Ihor Radchenko
2022-09-29 18:12 ` Stefan Monnier
2022-09-27 5:12 ` Matt Armstrong
2022-09-27 6:53 ` Eli Zaretskii
2022-09-27 17:31 ` Matt Armstrong
2022-09-27 18:45 ` Stefan Monnier
2022-09-28 23:09 ` Stefan Monnier
2022-09-29 14:54 ` Gerd Möllmann
2022-09-29 21:36 ` Stefan Monnier
2022-09-30 5:20 ` Gerd Möllmann
2022-10-06 4:47 ` Matt Armstrong
2022-10-06 5:43 ` Gerd Möllmann
2022-10-07 4:11 ` Matt Armstrong [this message]
2022-10-07 4:34 ` Gerd Möllmann
2022-10-07 13:33 ` Stefan Monnier
2022-10-07 14:29 ` Gerd Möllmann
2022-10-07 14:51 ` Stefan Monnier
2022-10-07 15:12 ` Gerd Möllmann
2022-10-07 17:12 ` Stefan Monnier
2022-10-07 14:56 ` Stefan Monnier
2022-10-07 15:59 ` Matt Armstrong
2022-10-07 15:34 ` Matt Armstrong
2022-10-06 12:08 ` Stefan Monnier
2022-09-27 8:39 ` Gerd Möllmann
2022-09-27 9:38 ` Eli Zaretskii
2022-10-06 20:41 ` Matt Armstrong
2022-10-07 16:51 ` Matt Armstrong
2022-10-07 18:28 ` Stefan Monnier
2022-10-08 23:33 ` Matt Armstrong
2022-10-09 3:44 ` Matt Armstrong
2022-10-09 4:12 ` Stefan Monnier
2022-10-09 15:34 ` Stefan Monnier
2022-10-10 2:57 ` Matt Armstrong
2022-10-10 6:24 ` Eli Zaretskii
2022-10-10 16:26 ` Matt Armstrong
2022-10-10 14:44 ` Stefan Monnier
2022-10-11 3:46 ` Matt Armstrong
2022-10-11 4:09 ` Stefan Monnier
2022-10-11 18:02 ` Matt Armstrong
2022-10-11 18:59 ` Stefan Monnier
2022-10-12 5:18 ` Matt Armstrong
2022-10-12 18:02 ` Stefan Monnier
2022-10-12 22:26 ` Matt Armstrong
2022-10-13 4:03 ` Stefan Monnier
2022-10-09 23:47 ` Stefan Monnier
2022-10-10 0:05 ` Emanuel Berg
2022-10-10 16:27 ` Matt Armstrong
2022-10-10 16:33 ` Matt Armstrong
2022-10-10 18:32 ` Matt Armstrong
2022-10-11 16:06 ` Stefan Monnier
2022-10-12 17:33 ` Matt Armstrong
2022-10-13 3:59 ` Stefan Monnier
2022-10-16 21:53 ` Matt Armstrong
2022-10-23 4:49 ` Matt Armstrong
2022-10-24 9:14 ` Stefan Kangas
2022-10-24 16:21 ` Matt Armstrong
2022-10-24 12:51 ` Eli Zaretskii
2022-10-25 20:57 ` Dmitry Gutov
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