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Yarroll,
As I'd posted late last week, there are 3 major
graduations of coding calculations in AmiBroker as far
as I can tell. As b has pointed out, I seriously
doubt you will see a major difference in speed in the
3 options you've laid out, as AmiBroker is already
crazy fast, particluarly if you are working with
locally stored data.
Regards,
Gary
Running from fastest to slowest:
Linear = 1 * 0 = 0;
Vector = IIF(A, B, C);
Looping
for (i = 0; i < BarCount, i ++)
{
blah[i];
}
--- b <b519b@xxxxxxxxx> wrote:
> Yarroll,
>
> AB is amazingly fast especially for most things so I
> doubt
> that there is any observable difference between the
> 3
> alternatives you list.
>
> Of course, if you do enough reiterations slight
> differences
> would appear, if, for example, you were running the
> code
> alternatives on a batch of 10,000 stocks. But for
> that
> number of stocks disk access and even RAM access
> speeds
> would be more significant than the alternative
> formulas you
> are considering.
>
> Although I have not kept a record, I have noticed
> that some
> formula structures seem to be slower. If my memory
> is
> correct using AMA() is slower than EMA().
>
> Perhaps others have more detailed notes on speed
> differences.
>
> Regards,
>
> b
>
> --- Yarroll <yarroll999@xxxxxxxxxxxxxx> wrote:
> > Hello,
> >
> >
> > In Amibroker, which option below is best from the
> > viewpoint of computation
> > speed:
> >
> > a)
> > (Close-LLV( Low, 15) ) / ( HHV( High, 15) - LLV(
> Low,
> > 15) ) * 100 > 80
> >
> > or
> > b)
> > (Close-LLV( Low, 15) ) / ( HHV( High, 15) - LLV(
> Low,
> > 15) ) * 10 > 8
> >
> > or
> > c)
> > (Close-LLV( Low, 15) ) / ( HHV( High, 15) - LLV(
> Low,
> > 15) ) > 0.8
> >
> >
> > Also, would it make sense for the same reason
> > (computation efficiency) to
> > round down all computed numbers to integers or at
> least
> > make digit precision
> > smaller. For example, 4-digit precision for
> indicators
> > makes
> > RSI(14)=52.1456, but I think very few people
> require that
> > much precision.
> > So does it make sense to keep using eg. RSI(14),
> or
> > change it into eg.
> > Prec( RSI(14), 1)
> >
> > Thank you. Best regards,
> > Yarroll
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
>
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