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Tomasz,
Thank you for your insights.
I wrapped my code today as you suggested below and in an earlier post
today, so unwrapped are only the uncalled functions and a few
variables initialized to keep out syntax errors. I am using a 90,000
bar 5 second database, but the chart timeframe is run at about 7,000
bars, and my complex loop processing is limited by parameter to less
than 2,000 bars. Changing that parameter to 200 bars reduces the
execution time from 1 second to .2 seconds, but as you suggested,
does not seem to have much affect on the apply time --which now
varies from 35 to 65 seconds. I also tried different tickers with
fewer bars (30,000) and it did made the apply time longer. So I
would say my edit apply time is no longer dependent on my database
size or AFL complexity.
Even though I am glad to have under a minute apply time now, it seems
as though there is still something else that is slowing it down. Do
any other possibilities come to mind?
One thing that I noticed, is that it is a consistent 35 seconds to
apply when I start up AB and just do a lot of applies. Switching
symbols, more edits, enabling complex AFL sections, etc. cause the
time to lengthen up to the 55 second area and it does not go back
down until I quit AB. I am guessing that these things take memory
that does not get released and it reduces the RAM available for
processing the apply.
PS. When I turn on ALL of my formula (enabled in sections with
multiple timeframes and indicators) it takes about 5 seconds to
execute with all the speed-up tricks so far --which is why I am
obsessed with getting the most speed I can out of AFL by clever
programming tricks.
Best regards,
Dennis
On Sep 4, 2007, at 6:00 PM, Tomasz Janeczko wrote:
> Dennis,
>
> If you are "applying" the code - it is for the first time executed
> with ALL bars, regardless of QuickAFL and SetBarsRequired settings.
>
> Now *if* your formula is complex and uses looping and you are using
> for example tick database with hundreds of thousands of bars
> it may take a while. Usually it is non-issue as people are not
> using such complex formulas.
> (1 second is *very* long for execution under normal circumstances.
> My formulas usually execute well below 0.1 sec).
>
> You may wrap your code into
>
> if( Status("action")==actionIndicator)
> {
> ...
> }
>
> and this will prevent this effect.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "Dennis Brown" <see3d@xxxxxxxxxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Tuesday, September 04, 2007 11:25 PM
> Subject: [amibroker] Why does it take so long to apply edits?
>
>
>> Hello,
>>
>> I have noticed that the time it takes to apply an edit to my large
>> indicator AFL takes a long but variable amount of time. It might
>> take 15 seconds one time and 3 minutes another time. It usually
>> takes about 2.5 minutes to apply an edit, though if there is a syntax
>> error, it comes back right away. The AFL itself has an execution of
>> about 1 second per pass and starts up right away from scratch.
>>
>> I was wondering if there were any general rules that I should be
>> aware of that would make applying edits faster and more consistent?
>>
>> Another thing that is interesting is that if I click anywhere on the
>> chart or UI while the edit is being applied, it runs even slower, and
>> always resets all the params.
>>
>> Insights anyone?
>>
>> Thanks,
>> Dennis
>>
>>
>>
>> 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.
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