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: [email protected] [mailto:[email protected]] On Behalf Of polomorabe Sent: Saturday, September 12, 2009 5:10 AM To: [email protected] 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 ------------------------------------ **** IMPORTANT PLEASE READ **** This group is for the discussion between users only. This is *NOT* technical support channel. TO GET TECHNICAL SUPPORT send an e-mail directly to SUPPORT {at} amibroker.com TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at http://www.amibroker.com/feedback/ (submissions sent via other channels won't be considered) For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: http://www.amibroker.com/devlog/ Yahoo! Groups Links
