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  3. May 2017

Re: Performance - RPG vs Cobol

I've not looked at the levels IBM supports recently, and certainly COBOL is a great language. My point is that IBM is devoting serious resources to RPG, and if there is a choice, I would choose RPG over COBOL because of that.

I'm not suggesting IBM is not enhancing COBOL, only that RPG is progressing much faster.

Jim Oberholtzer
Agile Technology Architects
Office: 414-433-4363
Cell: 414-915-1445
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"I've learned that courage is not the absence of fear, but the triumph over it. The brave man is not he who does not feel afraid, but he who conquers that fear". -- Nelson Mandela



On May 30, 2017, at 6:32 PM, John McKee <jmmckee3@xxxxxxxxx> wrote:

Jim, a question: I have looked, briefly, at the documentation for
gnu-cobol. Apparently, there are still new standards for cobol. I think
the most recent was 2014 (a guess). I agree that the language might not
make any measurable difference. But, I am wondering which standard IBM has
implemented on the i. Perhaps IBM is not on some current cobol standard as
maybe not a level of demand from customers.

John McKee

On Tue, May 30, 2017 at 6:11 PM, Jim Oberholtzer <
midrangel@xxxxxxxxxxxxxxxxx> wrote:

Assuming the code to be equally efficient, you won't be able to see a
difference between COBOL and RPG. In the end they produce about the same
executable.

That said (I am a COBOL fan) if you have the choice I'd go with RPG. The
development of the language is significantly better than COBOL. Mainly IBM
owns RPG and can do with it what it wants. COBOL on the other hand has
ANSI
standards that it must adhere to, even if IBM does put extensions into the
language for compatibility to their systems, IBM I, Mainframe, and AIX.


--
Jim Oberholtzer
Agile Technology Architects


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Vinay
Gavankar
Sent: Tuesday, May 30, 2017 6:02 PM
To: Midrange Systems Technical Discussion
Subject: Performance - RPG vs Cobol

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?
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