RE: RPG IV Performance

[Richard Reeve <richreeve@xxxxxxxxx>]

But what difference does it make?  Code efficiency has
absolutely nothing to do with object size.

--- Gerald Kern <gkern@buckeye-express.com> wrote:
> Try using PDM option 8 on the *PGM to look at the
> actual number of bytes for
> the object size. Use the RPGIII as a benchmark, then
> use the convert source
> to convert the same member to RPGIV, compile it and
> check that object with
> pdm option 8 as well. I think this would be a good
> place to start.
> 
> -----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 8:07 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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