From: Rich Felker <dalias@libc.org>
To: Alexander Monakov <amonakov@ispras.ru>
Cc: musl@lists.openwall.com, Markus Wichmann <nullplan@gmx.net>
Subject: Re: [musl] Re:Re: [musl] qsort
Date: Thu, 9 Feb 2023 14:52:45 -0500 [thread overview]
Message-ID: <20230209195245.GV4163@brightrain.aerifal.cx> (raw)
In-Reply-To: <23cd3146-4e39-6549-24ae-7fe7f24bed08@ispras.ru>
On Thu, Feb 09, 2023 at 10:20:45PM +0300, Alexander Monakov wrote:
>
> On Thu, 9 Feb 2023, Rich Felker wrote:
>
> > glibc does not use
> > it by itself, but uses "introsort", a fancy way to say it introspects
> > the quicksort (rather just counts the depth) and switches to an O(n
> > log n) algorithm once it's descended too many levels.
>
> This is so completely untrue. Glibc uses mergesort, falling back on
> quicksort with median-of-three pivot selection when allocating the
> intermediate array for mergesort fails or seems too costly:
Did this change at some point or have I just always been under the
wrong impression on this?
Rich
next prev parent reply other threads:[~2023-02-09 19:53 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-20 1:49 Guy
2023-01-20 12:55 ` alice
2023-01-30 10:04 ` [musl] " David Wang
2023-02-01 18:01 ` Markus Wichmann
2023-02-02 2:12 ` [musl] " David Wang
2023-02-03 5:22 ` [musl] " David Wang
2023-02-03 8:03 ` Alexander Monakov
2023-02-03 9:01 ` [musl] " David Wang
2023-02-09 19:03 ` Rich Felker
2023-02-09 19:20 ` Alexander Monakov
2023-02-09 19:52 ` Rich Felker [this message]
2023-02-09 20:18 ` Rich Felker
2023-02-09 20:27 ` Pierpaolo Bernardi
2023-02-10 4:10 ` Markus Wichmann
2023-02-10 10:00 ` [musl] " David Wang
2023-02-10 13:10 ` Rich Felker
2023-02-10 13:45 ` [musl] " David Wang
2023-02-10 14:19 ` Rich Felker
2023-02-11 5:12 ` [musl] " David Wang
2023-02-11 5:44 ` alice
2023-02-11 8:39 ` Joakim Sindholt
2023-02-11 9:06 ` alice
2023-02-11 9:31 ` [musl] " David Wang
2023-02-11 13:35 ` Rich Felker
2023-02-11 17:18 ` David Wang
2023-02-16 15:15 ` David Wang
2023-02-16 16:07 ` Rich Felker
2023-02-17 1:35 ` [musl] " David Wang
2023-02-17 13:17 ` Alexander Monakov
2023-02-17 15:07 ` Rich Felker
2023-02-11 9:22 ` [musl] " Markus Wichmann
2023-02-11 9:36 ` [musl] " David Wang
2023-02-11 9:51 ` David Wang
2023-01-20 13:32 ` [musl] qsort Valery Ushakov
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