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Hello,
Using an old AMD machine it used to take 21 seconds to do a simple scan
(under 100 symbols) to save the data. On a dual core was 2 seconds and now
on a brand new 4 core Q8200 2.33Ghz, 1333MHz FSB, 4MB L2 cache it takes less
than a blink of the eye.
JG
Ps. Had to get another one for the wife!!!
-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf
Of polomorabe
Sent: Saturday, September 12, 2009 5:10 AM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Backtest execution speed.
I've been backtesting ideas, and would like to get some feedback about
backtest performance.
I'm using a 3GHz P4 machine with 2GB RAM under WinXP, and when I work on a
collection of about 3,700 symbols, the execution time is 20 minutes on the
first run, and 16 minutes thereafter. I have configured the database as
follows, to ensure that the database is kept in RAM after the first run:
On Tools->Data:
- In-memory cache size (max symbols): 10,000
- Max megabytes: 1000
On File->Database Settings:
- Data source: TC200x/TCNet Plug-in
- Local data storage: <enable>
When executing, I notice at the bottom on the screen that each ticker
retrieval takes 12-16 ms. Is this a normal response time for data that is
supposedly being accessed from RAM? Using TuneUp 2009, I confirmed that the
memory was not full during the test (42% free).
I'm using AB professional v5.2.
Can anyone help, or have I misconfigured something?
Many thanks,
Paul
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SUPPORT {at} amibroker.com
TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
http://www.amibroker.com/feedback/
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