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  2. RPG400-L
  3. July 2008

Re: RPG III program calls faster than RPG IV????

I made the same tests as Charles (using the same code) on a completely different mcahine. The results I got were the same (i.e. the RPGIV->RPGIV calls took twice as long).

Charles posted the code previously. The called program just returns. Nothing else...


----- Original Message ----- From: "Shannon ODonnell" <sodonnell@xxxxxxxxxxxxxxxxxxxxxxxxx>
To: "'RPG programming on the AS400 / iSeries'" <rpg400-l@xxxxxxxxxxxx>
Sent: Monday, July 28, 2008 9:48 AM
Subject: RE: RPG III program calls faster than RPG IV????


Does each program have the same logic? And does each program use the same
files, do the same chains/reads in the same order?

Are you running these tests during off hours so that you do not have
cpu-intererence from other jobs?

If you are really interested in getting some definitive answers on this, you
need a bigger statistical sample. Why not write a group of three or four
additional programs (one OPM, one Dynamic Program call and one bound
procedure for each group) and then get a larger data set to work from?


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Wilt, Charles
Sent: Monday, July 28, 2008 8:32 AM
To: RPG programming on the AS400 / iSeries
Subject: RE: RPG III program calls faster than RPG IV????

So anybody else have any thoughts?

I realize it's probably not that important in the scheme of things, but I'm
curious as to what's going on.


Charles Wilt
--
Software Engineer
CINTAS Corporation - IT 92B
513.701.1307

wiltc@xxxxxxxxxx


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Wilt, Charles
Sent: Thursday, July 24, 2008 10:23 AM
To: RPG programming on the AS400 / iSeries
Subject: RPG III program calls faster than RPG IV????

All,

I was doing some benchmarking on an unused 515 running v5r4, and I'm
seeing some results that surprised me...

5M 50M
OPM calling OPM 6s 62s
Dynamic Program Call 12s 122s
Bound Procedure 1s 4s

--In the first case, an RPG III *PGM was calling another RPG III *PGM
(which returned with LR = *OFF).
--In the second case, an RPG IV *PGM was calling another RPG IV *PGM
(which returned with LR = *OFF).
--In the third, an RPG IV *PGM was calling a RPG IV procedure in a
*SRVPGM.

Both of the called programs and the called procedure simply RETURN.


I'm a little surprise to see RPG III program calls performing better
than RPG IV program calls. I thought perhaps it was activation group
related. Initially, I had *NEW calling *CALLER. I tried changing
both program to run in the same named activation group. That had no
effect. So I tried changing both to DFTACTGRP(*YES). That had a
little effect, lowering the times to 11s and 110s.

Does anybody have a explanation?


Charles Wilt
--
Software Engineer
CINTAS Corporation - IT 92B
513.701.1307
wiltc@xxxxxxxxxx



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