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Tomasz,
Your example is a bit strange. AFL does not need 5sec for 10 million
iterations, it is not a global measure, the total time depends
strongly on the code. It will not be 5 sec if we use an MA instead of
the sin function, it will be 5min and the total time will be much
longer if a Plot statement is added inside the loop.
It would help to write some basic "rules" for the execution time of
AFL loops [perhaps in some next newsletter] and some instructions how
to "optimize" AFL loops.
Dimitris
--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <amibroker@xxxx>
wrote:
> Hello,
>
> You should optimize your formula first so it does not ages to
execute.
>
> If your formula takes more than 1 second to execute you probably
> did something very weird or wrong because AFL itself including
loops are hyper fast.
>
> For example TEN million iteration of sine function like this:
> for(i=0;i<10000000;i++)
> {
> x = sin(i);
> }
>
> Takes only five seconds, so it takes 0.5 microsecond per iteration
(including calculation
> of trigonometric function).
>
> (Note that if you want to try this code you would need to adjust
the endless loop detection
> threshold level in Tools->Preferences->AFL to more than 10 million
loops, otherwise you will
> get endless loop warning).
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
>
> ----- Original Message -----
> From: "s.carrasset" <s.carrasset@xxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Thursday, September 30, 2004 3:55 PM
> Subject: [amibroker] NOT REALLY A BUG
>
>
> > hello, Tomasz.
> >
> > it can happens ( rarely ^_^) that I get a "displeasure" with
amibroker.
> > where can I send it , here or support?
> > for ex the last one:
> >
> > if I write or paste a code with many loops (with no error
inside) like
> > the last one parabolic code of Dimitri in message 71077.
> >
> > Amibroker becomes very slow to open the symbol workspace even if
i close
> > the code's window on the displayed chart pane.
> >
> > stephane
> >
> >
> >
> > Check AmiBroker web page at:
> > http://www.amibroker.com/
> >
> > Check group FAQ at:
http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
>
> [Non-text portions of this message have been removed]
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