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,FREEMAIL_FROM
	autolearn=unavailable autolearn_force=no version=3.4.4
X-Received: by 2002:a24:740f:: with SMTP id o15mr3254739itc.76.1559888712212;
        Thu, 06 Jun 2019 23:25:12 -0700 (PDT)
X-Received: by 2002:aca:d550:: with SMTP id m77mr2852008oig.155.1559888711969;
 Thu, 06 Jun 2019 23:25:11 -0700 (PDT)
Path: 
 eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!news.linkpendium.com!news.linkpendium.com!news.snarked.org!border2.nntp.dca1.giganews.com!nntp.giganews.com!s188no170510itb.0!news-out.google.com!l126ni234itl.0!nntp.google.com!s188no170508itb.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups: comp.lang.ada
Date: Thu, 6 Jun 2019 23:25:11 -0700 (PDT)
In-Reply-To: <87tvd2vssi.fsf@nightsong.com>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com;
 posting-host=2001:8004:1420:de2:3c2c:6580:a925:cfe;
 posting-account=rfeywQoAAAC0TKn5ZjdVW0ytcQM1oMSv
NNTP-Posting-Host: 2001:8004:1420:de2:3c2c:6580:a925:cfe
References: <55b14350-e255-406c-ab11-b824da77995b@googlegroups.com>
 <qdbt6v$7qa$1@dont-email.me>
 <6776b034-1318-49b3-8ff5-5a2f746fac9c@googlegroups.com>
 <87blzaxnei.fsf@nightsong.com> <877e9yxamb.fsf@nightsong.com>
 <5425afe3-8e22-4b1b-913c-f274fac7021a@googlegroups.com>
 <87tvd2vssi.fsf@nightsong.com>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <4c95ff02-43c4-44aa-ab65-db688f0c2e17@googlegroups.com>
Subject: Re: Toy computational "benchmark" in Ada (new blog post)
From: David Trudgett <dktrudgett@gmail.com>
Injection-Date: Fri, 07 Jun 2019 06:25:12 +0000
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Xref: reader01.eternal-september.org comp.lang.ada:56528
Date: 2019-06-06T23:25:11-07:00
List-Id: <comp.lang.ada>

Il giorno venerd=C3=AC 7 giugno 2019 16:00:31 UTC+10, Paul Rubin ha scritto=
:

> David Trudgett writes:
> > You have not coded the same thing as the Ada code. Do you know any Ada
> > at all?
>=20
> Not much.  I followed the single threaded code pretty closely though,
> then used what I think is the current idiomatic C++ method of doing this
> stuff with threads, since C++ doesn't have Ada-like tasks.

Okay. Even with the single threaded one, you will see that no setup time is=
 included in the timing of the work.

>=20
> >> At each of the 50 calculation runs, I launch 4 threads
> > As you should know, the Ada code does not do this.
>=20
> Yes I'll see if I can rework the C++ code to not launch new threads at
> each run.  The total number of threads launched isn't all that large
> though, and there are never more than 4 running concurrently.

It doesn't matter if you don't time that part of the execution. But I'm gue=
ssing that would be hard in C++.

Cheers,
David