Re: Date * 10000.01

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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