RE: Performance - RPG vs Cobol

All file reading by Synon 2E is settll reade with no blocking. It's pretty much RPGIII.


John Slanina

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Rob Berendt
Sent: Wednesday, May 31, 2017 8:11 AM
To: Midrange Systems Technical Discussion
Subject: Re: Performance - RPG vs Cobol

I would not think there would be a performance difference.

That being said however, there are some interesting defaults...
For example, an RPG Input Primary file has some interesting record blocking which I've found to be a performance boost. Sure, you can tailor your blocking factor in other files but I was talking about defaults here.
Just look at the compiler messages on an Input Primary file about blocking.

However, since their generator supports both RPG and COBOL what are the odds they are using Input Primary files?

Defaults are important when the gods forbid you to modify generated code.


Rob Berendt
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http://www.dekko.com





From: Vinay Gavankar <vinaygav@xxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 05/30/2017 07:02 PM
Subject: Performance - RPG vs Cobol
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Hi,

I was wondering whether there is a performance difference between RPG and
Cobol code trying to execute the same functionality which is I/O heavy
(rather than calculations).

I realize that a lot might depend on how the actual code is written, but
is
there a general guideline?

My client uses Synon 2E (which allows you to generate OPM/ILE RPG/Cobol
source), and there are some programs which are currently OPM Cobol. We are
planning on regenerating them as ILE and we have a choice of doing either
RPG or Cobol. Is there any particular reason that we should choose one
over
the other?

The plan is to change all the programs in the job stream to ILE just to
keep them in the same Activation Group.

These are common modules which are being called from a various RPG/Cobol
programs.

The programs accept a bunch of parameters. Are there any pitfalls if we
convert to ILE RPG in accepting the parameters?