From: Rich Felker <dalias@aerifal.cx>
To: musl@lists.openwall.com
Subject: Re: Thinking about release
Date: Thu, 11 Jul 2013 00:33:48 -0400 [thread overview]
Message-ID: <20130711043348.GM29800@brightrain.aerifal.cx> (raw)
In-Reply-To: <CAL3m8eA-D==UjssLjxbFNpisQM=xaTo=KQHRmzcp1S-=XOnfOw@mail.gmail.com>
On Wed, Jul 10, 2013 at 11:30:47PM -0500, Strake wrote:
> On 09/07/2013, Andre Renaud <andre@bluewatersys.com> wrote:
> > I wasn't too sure on memmove, but I've seen a reasonable amount of
> > code which just uses memmove as standard (rather than memcpy), to
> > avoid the possibility of overlapping regions. Not a great policy
>
> Why? What loss with memmove? That it takes 1.0125 times as long as
> memcpy, other than when memcpy might just trash the array or summon
> nasal demons anyhow?
If you're performing a copy between objects that overlap, or if you're
not sure whether you might be, then it's very likely that you'd doing
something wrong. Or at least that's my opinion.
Anyway I have no objection to an optimized memmove, but I do think
starting with just memcpy is easier for review and
cleanup/optimization.
Rich
next prev parent reply other threads:[~2013-07-11 4:33 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-13 1:25 Rich Felker
2013-06-13 1:33 ` Andre Renaud
2013-06-13 1:43 ` Rich Felker
2013-07-09 5:06 ` Andre Renaud
2013-07-09 5:37 ` Rich Felker
2013-07-09 6:24 ` Harald Becker
2013-07-09 21:28 ` Andre Renaud
2013-07-09 22:26 ` Andre Renaud
2013-07-10 6:42 ` Jens Gustedt
2013-07-10 7:50 ` Rich Felker
2013-07-10 22:44 ` Andre Renaud
2013-07-11 3:37 ` Rich Felker
2013-07-11 4:04 ` Andre Renaud
2013-07-11 5:10 ` Andre Renaud
2013-07-11 12:46 ` Rich Felker
2013-07-11 22:34 ` Andre Renaud
2013-07-12 3:16 ` Rich Felker
2013-07-12 3:36 ` Andre Renaud
2013-07-12 4:16 ` Rich Felker
2013-07-24 1:34 ` Andre Renaud
2013-07-24 3:48 ` Rich Felker
2013-07-24 4:40 ` Andre Renaud
2013-07-28 8:09 ` Rich Felker
2013-07-11 5:27 ` Daniel Cegiełka
2013-07-11 12:49 ` Rich Felker
2013-07-15 4:25 ` Rob Landley
2013-07-10 19:42 ` Rich Felker
2013-07-14 6:37 ` Rob Landley
2013-07-11 4:30 ` Strake
2013-07-11 4:33 ` Rich Felker [this message]
2013-07-10 19:38 ` Rob Landley
2013-07-10 20:34 ` Andre Renaud
2013-07-10 20:49 ` Nathan McSween
2013-07-10 21:01 ` Rich Felker
2013-06-13 15:46 ` Isaac
2013-06-26 1:44 ` Rich Felker
2013-06-26 10:19 ` Szabolcs Nagy
2013-06-26 14:21 ` Rich Felker
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