I just tried the QuickAFL as suggested by TJ below with a system which
tests all of NASDAQ over 5 month period. Data can go back as much as
20years. Improvement in Optimization time was about 30%.
I also made another observation. I was already running a number of
other programs, using from 25 to 40% of CPU time when I started AB. It
was taking about 18 seconds per iteration with QuickAFL off but only
about 13 seconds with QuickAFL on.
But Wait. I then closed all my programs, including AB. Then restarted
AB only. Iteration times were reduced to 10 and 7 seconds
respectively. And finally, left AB running and restarted all the other
programs. Iteration times still about 10 and 7 seconds. I'm guessing
that the reason for this has something to do with how data is stored in
cache.
BTW, I am running AB32 5.30.4 on XP64 SP2; Intel Core 2 Quad Q6600,
2.4GHz; 8GB RAM.
-- Keith
On 8/25/2010 12:02, Tomasz Janeczko wrote:
Hello,
Turn on QuickAFL in the Automatic Analysis Settings.
Best regards,
Tomasz Janeczko
amibroker.com
On 2010-08-25 17:46, Perumal wrote:
> Hi all,
>
> My database has data for a period of 2 years of intra day data. I
want to optimize certain parameters on a programme on the data of last
6 months only. It takes 15 minutes for optimization.
>
> If I export only the the data of only last 6 months to a separate
database (this database will contain only this 6 months data), it
takes only 5 minutes for the same optimization.
>
> That is, for the same optimization on 6 months data, it takes long
time if I use larger database, and takes less time if I use a small
database. The problem is that I have to export the last 6 months data
to a separate database every time I want to do optimization.
>
> I am sure there might be some way by which I could do the
optimization on the main data base itself, without taking long time.
>
> Can somebody tell how to achieve this.
>
> With best regards
>
> UMR Perumal
>
>
>
>
>
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