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@xxxxxcom>
To:
<amibroker@xxxxxxxxxps.com>
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@xxxxxxxxxps.com,
"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@xxxxxxxxxps.com>
>>
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
>
>
>
>
>