C/C++ speed optimization bible/resources/pointers needed!

In sci.physics Peter J. Holzer <hjp-usenet2@hjp.at> wrote:
> ["Followup-To:" header set to comp.programming.]
> On 2007-07-28 14:55, jimp@specsol.spam.sux.com <jimp@specsol.spam.sux.com> wrote:
> > In sci.physics Michael Moroney <moroney@world.std.spaamtrap.com> wrote:
> >> Unlike TOPS-10 and RT-11, VMS is still actively being developed, runs on
> >> Intel Itanium processors and is at version V8.3-1. It is no longer the
> >> general purpose system you may remember it as, but is used in niche
> >> applications, particularly "you bet your business on your data"
> >> applications like the financial sector.
> >
> > Is this based on that DEC version on Unix DEC started pushing just before
> > they got bought up?

> No. VMS is quite a different beast than Unix.

No shit?

How about pulling the crystal ball out of your ass along with the
useless comment and tell me about the "VMS" this guy is using?

--
Jim Pennino

Remove .spam.sux to reply.

"Richard Heathfield" <rjh@see.sig.invalid> wrote in message
news:AM6dnS2m949iwjbbRVnyvgA@bt.com...
: Androcles said:
:
: > If you want to find stupidity look no further than right here.
:
: Well, you said it, not me.

Did you snip something I wrote because it embarrassed you?

You are too quickly assuming any extra terrestrial intelligence would be so
STUPID as to invite invasion by the bunch of war-like Neanderthals
we call "human" by broadcasting their existence to the universe, when we
have broadcast our own war films showing just what we are really like and
how crazy we really are in destroying our own kind as well as other species.
If you want to find stupidity look no further than right here, FUCKHEAD.

Androcles said:

>
> "Richard Heathfield" <rjh@see.sig.invalid> wrote in message
> news:AM6dnS2m949iwjbbRVnyvgA@bt.com...
> : Androcles said:
> :
> : > If you want to find stupidity look no further than right here.
> :
> : Well, you said it, not me.
>
> Did you snip something I wrote because it embarrassed you?

Nope - you made it clear in your last reply to me that you don't
understand the concept of snippage. Now you appear to have made it
clear that you don't understand the concept of irony.

Let's see what else you don't understand...

> You are too quickly assuming any extra terrestrial intelligence would
> be so STUPID as to invite invasion by the bunch of war-like
> Neanderthals we call "human" by broadcasting their existence to the
> universe, when we have broadcast our own war films showing just what
> we are really like and how crazy we really are in destroying our own
> kind as well as other species.

Ah yes - you also don't understand my earlier reply. Well, no surprise
there.

> If you want to find stupidity look no further than right here,

Indeed.

> FUCKHEAD.

Not just stupidity, then, but abuse as well. Gosh, aren't you the clever
one, thinking up great big words like that all by yourself?

--
Richard Heathfield <http://www.cpax.org.uk>
Email: -www. +rjh@
Google users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999

"Richard Heathfield" <rjh@see.sig.invalid> wrote in message
news:V8KdnQ816axAJjbbnZ2dnUVZ8svinZ2d@bt.com...
: Androcles said:
:
: >
: > "Richard Heathfield" <rjh@see.sig.invalid> wrote in message
: > news:AM6dnS2m949iwjbbRVnyvgA@bt.com...
: > : Androcles said:
: > :
: > : > If you want to find stupidity look no further than right here.
: > :
: > : Well, you said it, not me.
: >
: > Did you snip something I wrote because it embarrassed you?
:
: Nope - you made it clear in your last reply to me that you don't
: understand the concept of snippage. Now you appear to have made it
: clear that you don't understand the concept of irony.
:
: Let's see what else you don't understand...
:
: > You are too quickly assuming any extra terrestrial intelligence would
: > be so STUPID as to invite invasion by the bunch of war-like
: > Neanderthals we call "human" by broadcasting their existence to the
: > universe, when we have broadcast our own war films showing just what
: > we are really like and how crazy we really are in destroying our own
: > kind as well as other species.
:
: Ah yes - you also don't understand my earlier reply. Well, no surprise
: there.
:
: > If you want to find stupidity look no further than right here,
:
: Indeed.
:
: > FUCKHEAD.
:
: Not just stupidity, then, but abuse as well. Gosh, aren't you the clever
: one, thinking up great big words like that all by yourself?
:
I'll handle this the easy way.
*plonk*

Androcles said:

<snip>

> I'll handle this the easy way.
> *plonk*

Good man. If you can't win an argument, run away fast.

But perhaps that's the explanation right there. The rest of the galaxy
has seen the quality of our TV programs steadily declining over the
last thirty light-years[1] or so; they have therefore rightly decided
to killfile us and head over to Rigel instead (presumably for its
vastly superior sports coverage). I can't say I blame them.

[1] The light-year is of course a measure of distance, not time; I'm
referring to the ever-expanding globe of electromagnetic radiation
emanating from the Earth. If our galactic co-citizens miss an episode
of EastEnders, all they have to do is cruise away from Earth for a few
light-hours, which (if they time it right) should give them enough
respite to make a decent cup of coffee[2] while they wait for the
signal to catch up with them.

[2] Coffee is like Avogadro's Number - it's a universal constant.

--
Richard Heathfield <http://www.cpax.org.uk>
Email: -www. +rjh@
Google users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999

"Richard Heathfield" <rjh@see.sig.invalid> wrote in message
news:v5adnV0JRu9GWTbbnZ2dnUVZ8qijnZ2d@bt.com...


> But perhaps that's the explanation right there. The rest of the galaxy
> has seen the quality of our TV programs steadily declining over the
> last thirty light-years[1] or so;

Not to worry.
Our TV programs don't have much coverage anyway. Somewhat 0.03 of light year
under the best assumptions.

VLV

jimp@specsol.spam.sux.com writes:

>In sci.physics Michael Moroney <moroney@world.std.spaamtrap.com> wrote:
>> jimp@specsol.spam.sux.com writes:

>> >In sci.physics Michael Moroney <moroney@world.std.spaamtrap.com> wrote:

>> >> 30 days? That's nothing. I work with VMS systems, which frequently have
>> >> uptimes measured in years, as long as the electric utility, thunderstorms
>> >> and UPS's cooperate.

>> >VMS?

>> >You got TOPS-10 and RT-11 too?

>> Unlike TOPS-10 and RT-11, VMS is still actively being developed, runs on
>> Intel Itanium processors and is at version V8.3-1. It is no longer the
>> general purpose system you may remember it as, but is used in niche
>> applications, particularly "you bet your business on your data"
>> applications like the financial sector.

>Is this based on that DEC version on Unix DEC started pushing just before
>they got bought up?

VMS is a DEC creation, but is certainly not Unix. The closest OS would be
RSX-11, on which it was originally based, with lots from other DEC OS's
thrown in. It does have a Unix-y X11 GUI and some attempts to add some
Unix features, but earlier on NIH syndrome kept would-be useful Unix
features out.

Go back in time 20 years ago and you'll see plenty of "Which is better,
VMS or Unix?" flamewars in Usenet.

On Jul 26, 5:19 pm, lunamoonm...@gmail.com wrote:
> C/C++ speed optimization bible/resources/pointers needed!
>
> Hi all,
>
> I am in the middle of programming to solve an engineering problem
> where the speed is huge concern. The project involving lots of
> numerical integration and then there are several loops/levels of
> optimization on top of the function evaluation engine. As you probably
> know, the key to a successful optimization is a fast underlying
> objective function evaluator. The faster it is, the more promising the
> optimization result(perhaps global optimal). However our project
> requires many numerical integrations which prohibits us from making it
> super fast. At the heart of the numerical integration is a smart
> integrator and a super-fast integrand function evaluator. Even worse,
> our function evaluation is in complex-domain. So the kay point is how
> to arrange our C/C++ code to make it highly efficient in every aspect.
> Could anybody give some advice/pointers on how to improve the speed of
> C/C++ program? How to arrange code? How to make it highly efficient
> and super fast? What options do I have if I don't have luxury to use
> multi-threaded, multi-core or distributed computing? But I do have a
> P4 at least. Please recommend some good bibles and resources! Thank
> you!

The following article should help:
http://www.eventhelix.com/RealtimeMa...AndCPPCode.htm

--
EventStudio 4.0 - http://www.EventHelix.com/EventStudio
Model in Plain Text; Generate Sequence Diagrams in PDF/Word

In sci.physics Michael Moroney <moroney@world.std.spaamtrap.com> wrote:
> jimp@specsol.spam.sux.com writes:

> >In sci.physics Michael Moroney <moroney@world.std.spaamtrap.com> wrote:
> >> jimp@specsol.spam.sux.com writes:

> >> >In sci.physics Michael Moroney <moroney@world.std.spaamtrap.com> wrote:

> >> >> 30 days? That's nothing. I work with VMS systems, which frequently have
> >> >> uptimes measured in years, as long as the electric utility, thunderstorms
> >> >> and UPS's cooperate.

> >> >VMS?

> >> >You got TOPS-10 and RT-11 too?

> >> Unlike TOPS-10 and RT-11, VMS is still actively being developed, runs on
> >> Intel Itanium processors and is at version V8.3-1. It is no longer the
> >> general purpose system you may remember it as, but is used in niche
> >> applications, particularly "you bet your business on your data"
> >> applications like the financial sector.

> >Is this based on that DEC version on Unix DEC started pushing just before
> >they got bought up?

> VMS is a DEC creation, but is certainly not Unix. The closest OS would be
> RSX-11, on which it was originally based, with lots from other DEC OS's
> thrown in. It does have a Unix-y X11 GUI and some attempts to add some
> Unix features, but earlier on NIH syndrome kept would-be useful Unix
> features out.

> Go back in time 20 years ago and you'll see plenty of "Which is better,
> VMS or Unix?" flamewars in Usenet.

I'm well aware of what the original VMS was, as well as RSX, RSTS, MUMPS,
TOPS-xx, and RT.

Trivia question: what was the RT-11 response to typing "who"?

Not too long before DEC ceased to exist they introduced something that
was basically Berkeley Unix with some DEC extensions and a DEC nameplate
on it in a feeble attempt to respond to the growing Unix tide.

As I recall, they called it "Open VMS" in an attempt to suck in the
true VMS crowd.

I was just curious if the VMS you are running is a derivitive of the
original VMS or the later bastard child.

--
Jim Pennino

Remove .spam.sux to reply.

jimp@specsol.spam.sux.com writes:
> [...]
> As I recall, they called it "Open VMS" in an attempt to suck in the
> true VMS crowd.

I was one of the "true VMS crowd." My first job out of college, GTE
Government Systems (Mountain View, CA), had first a 11/780 followed
later by a cluster of various models, including at least one 8600.

From my perspective as a user of the system, I thought (and still
think) VMS was (is) the best OS I've ever used.

Do you remember EDT and its "no-keypad editing commands?" I
was a master at it.
--
% Randy Yates % "The dreamer, the unwoken fool -
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