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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: a07f3367d7,3a6a9f1d654285ba
X-Google-Attributes: gida07f3367d7,public,usenet
X-Google-NewGroupId: yes
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news2.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!t-online.de!news.buerger.net!nuzba.szn.dk!news.jacob-sparre.dk!pnx.dk!not-for-mail
From: Jacob Sparre Andersen <sparre@nbi.dk>
Newsgroups: comp.lang.ada
Subject: Re: Ada Shootout program for K-Nucleotide (patches)
Date: 03 Aug 2009 14:36:59 +0200
Organization: Jacob Sparre Andersen
Sender: sparre@jspa-nykredit
Message-ID: <87bpmxdqfo.fsf@nbi.dk>
References: <4a743343$0$32674$9b4e6d93@newsspool2.arcor-online.net>
 <0c18b36c-7af0-454c-8208-9b0416111a1f@w41g2000yqb.googlegroups.com>
 <87fxc9e0mg.fsf@nbi.dk>
 <4a76cd4f$0$31329$9b4e6d93@newsspool4.arcor-online.net>
NNTP-Posting-Host: 79.138.239.46.bredband.3.dk
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: munin.nbi.dk 1249303081 8342 79.138.239.46 (3 Aug 2009 12:38:01 GMT)
X-Complaints-To: news@jacob-sparre.dk
NNTP-Posting-Date: Mon, 3 Aug 2009 12:38:01 +0000 (UTC)
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.4
Xref: g2news2.google.com comp.lang.ada:7540
Date: 2009-08-03T14:36:59+02:00
List-Id: <comp.lang.ada>

Georg Bauhaus wrote:
> Jacob Sparre Andersen schrieb:

> > Wouldn't it be even faster to map the data file to a string (using
> > POSIX.Memory_Mapping.Map_Memory), and then "read" from that
> > string?
> 
> According to the FAQ, "programs are expected to either take a single
> command-line parameter or read text from stdin."

If we interpret this as the choice of the implementer, then there is
no problem.  If the programs have to be able to read from stdin, then
memory mapped files aren't of much use.

> "Each program was run as a child-process of a Python script using
> Popen"

That's not a problem.

> There also is a "preference for plain vanilla programs".

I would definitely consider POSIX plain vanilla on a Linux system.

> It seems, then, that Ada has not the best built in support for
> programs that should quickly read and write lines of chars from and
> into pipes, respectively.

Agreed.

Greetings,

Jacob
-- 
"We will be restoring normality as soon as we are sure what is normal anyway."