RE: RPG IV Performance

Boy, are you a troublemaker!

I did follow the earlier suggestion, and checked their sample RPGIII program
size against the same program converted to RPGIV.  After removing observability,
the results were RPGIII 36864, RPGIV 40960 ... not significant, in my mind, and
certainly not 5 - 10 times the size!  I have printed out all the responses from
all of you, and am anxious for my meeting next week with the consultants!

Thanks to all for the feedback.





"Stone, Brad V (TC)" <bvstone@taylorcorp.com> on 01/19/2001 10:10:32 AM

Please respond to RPG400-L@midrange.com

To:   "'RPG400-L@midrange.com'" <RPG400-L@midrange.com>
cc:    (bcc: Lisa Abney/Flavor-Indianapolis/NAFL/UFC)

Subject:  RE: RPG IV Performance



I agree.  While there may be some truth to it (we know the size is bigger,
but does that make it slower?) I think they're just trying to justify their
$$ rate by blowing smoke and sounding smart.

Tell them you'd like to use Java instead, then see what they say.

Brad

> -----Original Message-----
> From: Mark A. Manske [mailto:mmanske@minter-weisman.com]
> Sent: Friday, January 19, 2001 8:49 AM
> To: RPG400-L@midrange.com
> Subject: RE: RPG IV Performance
>
>
> IMHO I would say that these people are looking for a way to
> avoid coding in
> RPGIV by saying these things -
> is there a true issue, I really do not know how the bare
> metal code works;
> but keep the following in mind -
>
> A trigger program against a file, regardless of "language
> used" is executed
> at the OS level when something
> happens to the file as you have specified (IE: record added, changed,
> deleted; and a time to perform the
> trigger program - before, after the file operation) it does
> not "run in the
> back ground" it gets called
> from the OS because of the file operation; similar to exit
> programs for say
> FTP, these are not running all
> the time, they get called based on the file, not the user.
>
> As for program size - we are no longer in the S/34 world
> (been there) where
> we could only go up to a 64K
> program and had to be "creative" in keeping size down.
> Unless you have an
> undersized AS/400-this is a
> mute point, and if you do, you most likely have many other issues with
> performance to worry about.
>
>
> I know there are others out here that can better explain the "nuts and
> bolts"; but basically it sounds
> like they are blowing smoke.
>
> HTH
> Mark A. Manske
> [mailto:mmanske@minter-weisman.com]
> Sr. Project Lead
> Minter-Weisman
>
>
>
>
> -----Original Message-----
> From: owner-rpg400-l@midrange.com
> [mailto:owner-rpg400-l@midrange.com]On
> Behalf Of Lisa.Abney@universalflavors.com
> Sent: Friday, January 19, 2001 7:07 AM
> To: RPG400-L@midrange.com
> Subject: RPG IV Performance
>
>
>
>
> Hi all!  I've just heard some rather negative performance
> things on RPG IV,
> and
> wonder if anyone can give me some feedback on how true this might be.
>
> We're working with a consulting company who is doing some performance
> analysis
> on some of our programs.  They seem very knowledgeable, and I
> have a lot of
> confidence in what they've done up until now.  However, today
> they were
> showing
> us a mock-up of a trigger program they want to use.  As they
> explained it,
> this
> trigger program will be constantly running in the background
> for every user
> on
> the system to monitor changes to two files, and will feed
> data to a dataque.
> The program they showed me was written in RPGIII, and I made my usual
> request to
> an outside contractor that this be done in RPGIV.  His
> response was "Sure,
> if
> you want the program size to be 5 - 10 times the size of an
> RPGIII program."
> When I asked him to explain that, he only said that, in his
> experience, this
> is
> always true, and that it would have a very negative
> performance.  I even
> mentioned removing observability (not that I really
> understand what that
> means,
> but I just read something the other day about that being a
> way to reduce
> program
> size!), and he said that might move it down to 3 - 5 times
> the size of an
> equivalent RPGIII program.  The program will only be about 50
> - 100 lines of
> code.
>
> Can someone explain if this is true, and, if so, why?  And,
> if true, what
> does
> this really mean from a performance standpoint?
>
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