Re: Benefits of Sub-procedures

["Buck" <buck.calabro@xxxxxxxxxxxx>]

> Let's not forget that the "sub-programs" which
> perform acceptably today for occasional interactive
> use are often the buggers that chew up our
> day-end window when called repeatedly in large batch runs!
>
> My point is that a good programmer should be looking
> forward a little ways at anticipated uses, and not
> just at the immediate problem at hand.

Excellent points John!

By way of agreement, I once worked on an application that progressed exactly
as you describe.  What ran well for a few dozen records at a time (load a
subfile page) became a morass when run over several thousand A/R
transactions in batch.  We ended up having to share access paths, not set LR
on when returning from the sub-programs and carefully minimise file I/O
(passing entire records as parameters instead of adding an F-spec and
CHAINing.)  This was on S/38, so there was no easy way around the problem
unless we converted the sub-programs to /COPY members.  The name collisions
alone would have spelt doom to that attempt.
  --buck