Re: Named indicators (was DOW vs DOU)

[cmassoglia@xxxxxxxxxxx (Charlie Massoglia)]

James Kilgore wrote:

>BTW I have never understood the expensive use of MOVEA to turn
>indicators off or on when you can't get any clearer then an explicit
>SETOF or SETON.  In an earlier post abount scanning for indicator
>useage, you would never find the indicators being turned off/on with a
>MOVEA. 
>
Have you ever run a performance comparison on multiple SETOFs versus a
single MOVEA?  A test in RPG IV setting off a block of indicators 50,000
times resulted in the following times:

SETOF 20,21,22  SETOFF 23,24,25 .......    16 seconds
MOVE *OFF *IN20, MOVE *OFF *IN20.......    16 seconds
EVAL *IN20 = *OFF, EVAL *IN21 = *OFF...    16 seconds
MOVEA OFF20 (named constant) *IN,20....     9 seconds

The MOVEA is the most efficient method to turn off a block of indicators.
Of course my first test of 500 times and my second test of 5,000 times were
not enough to detect the difference.


Charlie Massoglia, Massoglia Technical Consulting, Inc.
PO Box 1065, Okemos, MI 48854, USA
517-676-9700  Fax: 517-676-1006  EMAIL: cmassoglia@voyager.net


* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* This is the Midrange System Mailing List!  To submit a new message,   *
* send your mail to "MIDRANGE-L@midrange.com".  To unsubscribe from     *
* this list send email to MAJORDOMO@midrange.com and specify            *
* 'unsubscribe MIDRANGE-L' in the body of your message.  Questions      *
* should be directed to the list owner / operator: david@midrange.com   *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *