RE: RPG IV Performance -- RPG400-L

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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