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Cum(B) is the culprit. There are way better ways to find
"first occurrence", like this single-liner:
ExRem( B, 0 ); // returns 1 on FIRST occurrence of B.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "itmwh" <toxutao@xxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Wednesday, June 06, 2007 2:23 AM
Subject: [amibroker] Re: Question: How to make the code run faster ?
> 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
>> >
>> >
>> >
>> >
>> >
>>
>
>
>
>
> 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
>
>
>
>
>
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:
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For other support material please check also:
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