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There is no reason to try to optimize a reasonably well written RPGLE
program. On an IBM I 720 with RAID and 4 disks most of what the power 7
processor does in a normal IBM I application environment is waiting for
disk I/O.


On Fri, Jan 4, 2013 at 4:08 PM, Jon Paris <jon.paris@xxxxxxxxxxxxxx> wrote:

Noooooooooooooooo ! Never ever sacrifice readability and maintainability
for performance unless it is absolutely the only answer left.

Besides - If you use optimization then the smaller the "bits" the more it
can do for you to improve performance. It will literally move code around
to ensure that routines that operate together are in memory together.

Talking of optimization - using optimization based on run-time performance
collection data can also have a big impact.


On 2013-01-04, at 4:43 AM, rpg400-l-request@xxxxxxxxxxxx wrote:

I would also reduce the number of jumps in the program, i.e. reduce the
number of functions / subroutines, put more into one, it's messy, but
should gain some speed. Keep the most frequently used functions /
subroutines closer to the body of the program.

Use program optimization.

Jon Paris

www.partner400.com
www.SystemiDeveloper.com




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