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  • Subject: Re: Date * 10000.01
  • From: Jim Waymire <jimwaymire@xxxxxxxxxxxxxx>
  • Date: Wed, 18 Nov 1998 11:25:05 -0800
  • Organization: Crowell, Weedon & Co.

Al,
Does this mean the multiplication method will carry over into ILE ok?

Jim Waymire
Crowell, Weedon & Co.
Los Angeles, Ca

Al Barsa, Jr. wrote:

> At 09:53 AM 11/18/98 -0500, you wrote:
> >Angie Wawrzaszek wrote:
> >>Someone posted a multiplier that can be used to change an 8,0
> >>date from mdy to ymd and vice versa using the same multipier.
> >>I can not find that, and was hoping someone could re-post it.
> >>This is just a huge help for programs that are not yet converted
> >>to RPG1V.
> >
> >I'm not posting the multiplier.  I'm posting to
> >recommend against using a MULT operator to perform
> >date conversions.  I did some performance comparisons
> >a long time ago and found that using MULT to convert
> >a date was 100 to 150 times slower than 3 MOVEs.
> >Furthermore, when you do move to RPG IV, the technique
> >does not work if you use TRUNCNBR(*NO), or if you do
> >the multiplication in an expression.
>
> I strongly agree with Hans.  We did specific performance testing on this
> function in RPG III, and found it to be 48 times more expensive from a CPU
> perspective.
>
> Al
>
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