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Hello,
It all depends on many factors including
a) complexity of the formulas you use
b) length of data used and number of bars visible
c) screen resolution / color depth
d) 2D graphic card performance / drivers / amount of memory on the card, etc
As for a) and c) - for example
"Price all in one" formula shipped with AmiBroker
that plots price candlesticks, 3 moving averages, bollinger bands, and volume chart
takes about 0.008 sec when run on AthlonXP @1.8GHz clock speed when applied to 6000 daily bars.
It takes 0.009 sec when applied to 60000 1-minute bars if it is zoommed it and
can take as much as 0.4 sec when zoomed-out max (all bars visible).
As you can see timings depend largely on amounts of data that need to be processed.
All built-in formulas are written in optimum way so they take advantage of
QuickAFL feature that allows to use only visible bars to speed up processing.
However some user's formulas use functions like for example Cum() that
by nature require all bars. If your formula uses Cum() then, it forces using all bars
regardless of what visible bars are. This greatly increases execution time.
To find out how many bars your formula requires use Formula Editor, Tools->CHECK
menu. It will display the number of past and future bars required.
As for c) and d) depending on screen resolution / color depth / graphic card
certain operations may be hardware accelerated and some not. You may play
with these settings to find out optimum.
By the way: next version of AmiBroker will include the "chart timing display" feature
that display time spent in execution and drawing each chart pane, to help you
finding out which pane is causing biggest CPU load.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "Charles Stangor" <cstangor232@xxxxxxxxxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Friday, November 18, 2005 5:28 PM
Subject: Re: [amibroker] Graphics performance question
> What I discovered that is curious to me is that the CPU usage is involved in
> displaying the charts, not running the AFLs. My CPU usage ranges from 40-70
> percent max when AB is minimized -- the autotrading is working fine. But
> when I maximize AB the CPU goes immediately to 100%
>
> In any case, I'm going to need a deskop! How would the following specs from
> Dell compare to a dual core Athlon64?
>
> Description: Dell Dimension 5150 Series. Intel(r) Pentium(r) 4 Processor
> 630 w/HT Technology (3.0GHz,800FSB)
>
> Is the the dual-core from Intel a lot faster than a P4?
>
> Thanks!
>
> chuck
>
>
> ----- Original Message -----
> From: "Gino" <ggen@xxxxxxxxxxxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Friday, November 18, 2005 11:03 AM
> Subject: RE: [amibroker] Graphics performance question
>
>
>> Yep, time for a dual-core Athlon64.
>>
>> I am upgrading my box as we speak. Just waiting for the new motherboard,
>> unfortunately on backorder.
>>
>> If you have any questions, just ask, hope I can help.
>>
>> Gino
>>
>>
>> -----Original Message-----
>> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On
>> Behalf
>> Of Charles Stangor
>> Sent: Friday, November 18, 2005 10:44 AM
>> To: amibroker@xxxxxxxxxxxxxxx
>> Subject: Re: [amibroker] Graphics performance question
>>
>> Gino. The answer you gave me is correct - 100% CPU. Solution is a faster
>> computer or fewer windows I suppose? Thanks
>>
>>
>> ----- Original Message -----
>> From: "Gino" <ggen@xxxxxxxxxxxxx>
>> To: <amibroker@xxxxxxxxxxxxxxx>
>> Sent: Friday, November 18, 2005 10:18 AM
>> Subject: RE: [amibroker] Graphics performance question
>>
>>
>>> Hey Charles,
>>>
>>> You can check your "CPU Utilization" - most probably your CPU is
>>> "saturated", running at 90+ to 100% utilization.
>>>
>>> Go to Task Manager, Performance and you will see a graph of your CPU.
>>>
>>> Hope this will help.
>>>
>>> Best regards,
>>>
>>> Gino
>>>
>>>
>>> -----Original Message-----
>>> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On
>>> Behalf
>>> Of Charles Stangor
>>> Sent: Friday, November 18, 2005 9:44 AM
>>> To: amibroker@xxxxxxxxxxxxxxx
>>> Subject: [amibroker] Graphics performance question
>>>
>>> I have 6 charts open, each running 3 1-minute AFLs. I'm at the point
>>> that
>>> the windows display very slowly, if at all. The graphics from prior
>>> windows
>>>
>>> sometimes do not close when I switch to AB, so this seems like a video
>>> memory problem (as far as I can tell the execution of the AFLs is OK).
>>> I'm
>>>
>>> wondering if anyone else has dealt with this issue.
>>>
>>> Thanks in advance
>>>
>>>
>>>
>>>
>>> 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 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 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 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 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 other support material please check also:
> http://www.amibroker.com/support.html
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
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