Good point, but if you can reduce your REXX CPU using a JIT by at least
a half you don't care about zIIP elibility. The same applies for using
faster languages.
On 27/10/2017 11:16 PM, Martin Packer wrote:
And we didn't discuss zIIP-eligibility...
... It's a bit like compiling REXX...
... Don't expect it to buy you much if the things being scripted are heavy
compared to the things scripting them. Effectively the command processors
are JNI.
Cheers, Martin
Martin Packer,
zChampion, Principal Systems Investigator,
Worldwide Cloud & Systems Performance, IBM
+44-7802-245-584
email: [email protected]
Twitter / Facebook IDs: MartinPacker
Blog:
https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker
Podcast Series (With Marna Walle): https://developer.ibm.com/tv/mpt/ or
https://itunes.apple.com/gb/podcast/mainframe-performance-topics/id1127943573?mt=2
From: David Crayford <[email protected]>
To: [email protected]
Date: 27/10/2017 16:12
Subject: Re: IBM open sources its JVM and JIT code
Sent by: IBM Mainframe Discussion List <[email protected]>
On 27/10/2017 9:47 PM, Walt Farrell wrote:
Did we somehow arrive at a generalized requirement to be able to access
particular TSO/ISPF features from*other* programming languages that
are
not REXX, in a discussion about JITs, because of the functional utility
some z/OS system programmers desire to use other programming languages
besides REXX for scripts in TSO/ISPF?
I think we arrived at this idea because someone suggested it would be
nice if the open-sourced JIT technology that started this thread could be
applied to REXX. Then someone else said we don't really need that, because
NetREXX fulfills the desire to have REXX code that can be JITted. But then
someone else pointed out that NetREXX can't do all the same kinds of
things that REXX can, especially with respect to TSO and ISPF integration.
Therefore, as NetREXX can't substitute for REXX, we still have the
desire (if, perhaps, not the need) for a true classic REXX that can make
use of the JIT technology.
Best post in this thread! We want a JIT for classic REXX so it can run
at speeds similar to compiled languages.
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