Re: Application Architecture/Design Question

Service program is only loaded once. Performance of a procedure in a
service programs is almost the same as having it statically bound. You pay
a price when it first loads which is still very quick. The performance of a
procedure call is extremely fast. I think the last time I checked it was 10
million calls in the time it took to make 10 thousand program calls. Many
small, tight routines doing one thing instead of big programs doing
hundreds of things.


On Fri, Jan 25, 2013 at 11:34 AM, Michael Naughton <
michael_naughton@xxxxxxxxxxxx> wrote:

Thanks, Alan! This looks interesting -- I may give it a try. One question,
though: for a given user session, maybe five or six routines might be used,
but each one could be used a dozen times. Might there be performance issues
if a routine is dynamically
loaded over and over again?


"RPG programming on the IBM i \(AS/400 and iSeries\)" <
rpg400-l@xxxxxxxxxxxx> writes:

It would seem that you have a need for a service program. I would think
maybe a different module for each routine bound into one service program.
Is there nothing in the logic of these 99 routines that is common?

You definitely need a copy block for the prototypes.

It is also possible that you have a need to dynamically load a service
program based on your description. You said you only need to run one of

the

routines and you don't seem to know which one you need to run until run
time based on something in a database table. This would seem to be a
perfect place for a dynamically loaded service program. See my dynamic

load

service program at www.think400.dk/downloads.htm for further information.
If you go that route you would have a service program for each routine or
function.

Based on what you indicated I would bet you have common logic that could

be

factored out but only a guess.

Mike Naughton
Senior Programmer/Analyst
Judd Wire, Inc.
124 Turnpike Road
Turners Falls, MA 01376
413-676-3144
Internal: x 444
mnaughton@xxxxxxxxxxxx
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