Re: Named indicators (was DOW vs DOU)

[Neil Palmer <npalmer@xxxxxxxxxxx>]

Charlie Massoglia wrote:
> 
> 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,

Not that you would have a block of indicators in nicely structured code,
but again with MOVEA for setting on/off blocks of indicators aren't you
sacrificing readability and making it harder to scan/spot indicators
used in the source ?  If I remember correctly, they don't even show up
in the cross reference listing when you compile the program.
-- 
... Neil Palmer                                      AS/400~~~~~      
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