From: demerphq <demerphq@gmail.com>
To: Michael Haggerty <mhagger@alum.mit.edu>
Cc: git discussion list <git@vger.kernel.org>,
Junio C Hamano <gitster@pobox.com>
Subject: Re: remove_duplicates() in builtin/fetch-pack.c is O(N^2)
Date: Mon, 21 May 2012 11:42:06 +0200 [thread overview]
Message-ID: <CANgJU+WwA0FfwVFWO23o0wLbpXNS+RXwwx=VKZ_J3e57r1pBsQ@mail.gmail.com> (raw)
In-Reply-To: <4FB9F92D.8000305@alum.mit.edu>
On 21 May 2012 10:13, Michael Haggerty <mhagger@alum.mit.edu> wrote:
> I just noticed that the remove_duplicates() function in builtin/fetch-pack.c
> is O(N^2) in the number of heads. Empirically, this function takes on the
> order of 25 seconds to process 100k references.
Does "heads" in this context include tags? Sorry if this is a stupid question.
Yves
--
perl -Mre=debug -e "/just|another|perl|hacker/"
next prev parent reply other threads:[~2012-05-21 9:42 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-21 8:13 remove_duplicates() in builtin/fetch-pack.c is O(N^2) Michael Haggerty
2012-05-21 9:09 ` Junio C Hamano
2012-05-21 9:42 ` demerphq [this message]
2012-05-21 17:45 ` Jeff King
2012-05-21 22:14 ` Jeff King
2012-05-21 22:17 ` [PATCH 1/5] fetch-pack: sort incoming heads Jeff King
2012-05-22 20:08 ` Junio C Hamano
2012-05-22 20:23 ` Jeff King
2012-05-24 6:04 ` Jeff King
2012-05-21 22:17 ` [PATCH 2/5] fetch-pack: avoid quadratic behavior in remove_duplicates Jeff King
2012-05-21 22:19 ` [PATCH 3/5] add sorting infrastructure for list refs Jeff King
2012-05-21 22:19 ` [PATCH 4/5] fetch-pack: sort the list of incoming refs Jeff King
2012-05-21 22:23 ` [PATCH 5/5] fetch-pack: avoid quadratic loop in filter_refs Jeff King
2012-05-22 20:16 ` Junio C Hamano
2012-05-21 23:52 ` remove_duplicates() in builtin/fetch-pack.c is O(N^2) Jeff King
2012-05-22 0:07 ` Jeff King
2012-05-22 3:59 ` Michael Haggerty
2012-05-22 4:11 ` Jeff King
2012-05-22 7:15 ` Michael Haggerty
2012-05-22 7:37 ` Jeff King
2012-05-22 13:28 ` Michael Haggerty
2012-05-22 17:33 ` Jeff King
2012-05-24 12:05 ` Michael Haggerty
2012-05-25 0:17 ` Martin Fick
2012-05-25 0:39 ` Jeff King
2012-05-25 0:54 ` Martin Fick
2012-05-25 1:04 ` Jeff King
2012-05-25 1:32 ` Martin Fick
2012-05-25 6:50 ` Jeff King
2012-05-22 12:18 ` Nguyen Thai Ngoc Duy
2012-05-22 13:35 ` Michael Haggerty
2012-05-22 17:01 ` Jeff King
2012-05-22 17:35 ` Junio C Hamano
2012-05-22 17:46 ` Jeff King
2012-05-24 4:54 ` Michael Haggerty
2012-05-23 1:20 ` Nguyen Thai Ngoc Duy
2012-05-22 16:16 ` Junio C Hamano
2012-05-21 18:15 ` Martin Fick
2012-05-21 19:41 ` Jeff King
2012-05-21 22:08 ` Junio C Hamano
2012-05-21 22:24 ` Jeff King
2012-05-22 5:51 ` Martin Fick
2012-05-22 18:21 ` Jeff King
2012-05-22 22:19 ` Martin Fick
2012-05-22 23:23 ` Junio C Hamano
2012-05-23 0:46 ` Martin Fick
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