From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,2a34b7ad6c6a0774
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII
Path: 
 g2news1.google.com!news3.google.com!feeder.news-service.com!nf02.dk.telia.net!starscream.dk.telia.net!news.tele.dk!news.tele.dk!small.news.tele.dk!bnewspeer01.bru.ops.eu.uu.net!bnewspeer00.bru.ops.eu.uu.net!emea.uu.net!newsfeed.arcor.de!newsspool4.arcor-online.net!news.arcor.de.POSTED!not-for-mail
From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Efficiency of code generated by Ada compilers
Newsgroups: comp.lang.ada
User-Agent: 40tude_Dialog/2.0.15.1
MIME-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: 8bit
Reply-To: mailbox@dmitry-kazakov.de
Organization: cbb software GmbH
References: <f3c0cf89-6993-4b83-b4fe-8a920ce23a14@f6g2000yqa.googlegroups.com>
 <f208e17c-0511-4397-a13a-39a3da6eef5e@q22g2000yqm.googlegroups.com>
 <wccr5i985py.fsf@shell01.TheWorld.com> <i3nbgd$a3e$1@speranza.aioe.org>
 <1jn1a4o.1dfllwo1uin3imN%csampson@inetworld.net>
 <m262zhyogo.fsf@pushface.org> <1jn36d6.se2f0g1edjjnyN%csampson@inetworld.net>
 <m28w4bfxdy.fsf@pushface.org> <C88A1675.14CE6A%yaldnif.w@blueyonder.co.uk>
 <61f149b9-00ff-40cd-9698-01e69fdc5c0f@v15g2000yqe.googlegroups.com>
Date: Fri, 13 Aug 2010 17:37:16 +0200
Message-ID: <1fwir3k681b8x.unwo52g4gt32.dlg@40tude.net>
NNTP-Posting-Date: 13 Aug 2010 17:37:14 CEST
NNTP-Posting-Host: 7f168f48.newsspool2.arcor-online.net
X-Trace: 
 DXC=NR^oL0556KYAX0F2i><W:SA9EHlD;3YcR4Fo<]lROoRQ8kF<OcfhCO[cmYCB@kH:^U[6LHn;2LCV^[<mhadbfdU[WA]D\Y7Cg6[m@Uf4YdABQQ
X-Complaints-To: usenet-abuse@arcor.de
Xref: g2news1.google.com comp.lang.ada:13224
Date: 2010-08-13T17:37:14+02:00
List-Id: <comp.lang.ada>

On Fri, 13 Aug 2010 08:08:42 -0700 (PDT), Elias Salom�o Helou Neto wrote:

> 1) You can, in more than one way, tell the compiler to suppress most
> (any?) checks, but people do not advise to do so. Even if I say that I
> do need that :(

You think you need that, but you cannot know it, because you didn't used
Ada and have no experience to realistically estimate the amount of checks
an Ada compiler would introduce in your, not yet developed program.

> P.S: Multidimensional _arrays_ are not multidimensional _matrices_

I don't see any difference, unless specialized non-dense matrices are
considered.

> neither are them MD _images_.

Same here. Multi-channel images, sequences of images, scenes can be seen
and implemented as  arrays. Again, unless some special hardware is in play.

> The two latter are far more specific
> classes and the last case even needs to be templated in, say, pixel
> type, etc.

I don't see a great need in that. Usually the type of pixel (grayscale,
tricky color models, separate channels etc) influences image operations so
heavily that the common denominator might become too thin to be useful, at
least in the case of image processing.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de