[amibroker] Re: Question: How to make the code run faster ?

["itmwh" <toxutao@xxxxxxxx>]

Hi, TJ

I checked  my AFL codes and found it costs 5-7 secondes and 
virtually takes all past bars in the calculation of every bar.  I 
think it may be the fact that I use the function " cum()".  I am 
using this function because I want to express the idea of "first 
incurrence of ....."

    A = .....;
    B=......;
    Bnum= Cum(B);
    AsinceB= Bnum - ValueWhen(A,Bnum );
    firstAsinceB=AsinceB==1;

I use above calculation 3 times in my indicators, and guess that's 
why the speed is slowed down.   Is there a way to get out ?
Thanks/ itmwh





--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx> 
wrote:
>
> Hello,
> 
> Post the FORMULA you are using and then you will be able to get 
help.
> 
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message ----- 
> From: "itmwh" <toxutao@xxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Tuesday, June 05, 2007 2:09 PM
> Subject: [amibroker] Question: How to make the code run faster ?
> 
> 
> > Hi, when I open a 1-minute chart with certain custom indicator, 
the CPU 
> > usage always rocket to above 90%, making it very inconvenient to 
move 
> > the crosshair on the chart, and do other basic chartings on the 
chart. 
> > When I run the same indicator on 5-minute chart, the speed is 
OK, CPU 
> > is operating at below 20%, it seems more bars on a 1-minute 
chart slow 
> > down the program.  I want to know is there a method to let the 
program 
> > operate faster ?  Or is it possible to let AB only calculate the 
value 
> > of the indicators in the visible bars ?
> > 
> > 
> > 
> > Please note that this group is for discussion between users only.
> > 
> > To get support from AmiBroker please send an e-mail directly to 
> > SUPPORT {at} amibroker.com
> > 
> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> > http://www.amibroker.com/devlog/
> > 
> > For other support material please check also:
> > http://www.amibroker.com/support.html
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> >
>




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