improve the Rexx execution

nallapureddy · New User Joined: 27 Jul 2005 Posts: 18

Hi ,
Is there any way through which we can reduce the Rexx program execution time or in other words is there any way to speed up the Rexx Program Execution.

Thanks,
Madhavi

MGIndaco · Posted: Wed Aug 31, 2005 3:39 pm Post subject:

Yes, compile it!
Someone told me a improve of 90 % but in my cases I only reduced the time of program to a six part: 1 hour = 10 minutes.

Is this what you need?

Kevin · Active User Joined: 25 Aug 2005 Posts: 258

- Make sure to run native REXX (use the IRXJCL program, not IKJEFT01). There is more overhead involved with starting and running in a TSO address space instead of an MVS address space.

- Avoid using EXECIO. Avoid any file I/O as much as possible.

- Use UNIT=VIO for small-scale file I/O operations.