It should take less. Maybe you have firewall problems. I checked and it backfills with speed of about 500+ bars per second, so backfill of 1000 bars of single symbol using IQFeed takes about 2 seconds on my end (2mbps DSL)
Indeed it used to be faster in the past (3 or 4 times faster from memory), so I guess some limits were added by IQFeed recently. Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: "przemyslawuk" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, November 05, 2008 10:52 PM Subject: [amibroker] Re: "SLOW" backfill and delay with IQFeed > Tomasz, I was trying to use AB with a minimum amount of data. > Currently my database settings are : 1min/1100bars/32kb per symbol. > So, 60 symbols*32kb=1.8Mb > I don't understand why intraday scan with "wait for backfil" takes > almost 1 hour. I understand that there must be some additional > "negotiation" -request the symbol, wait for data....etc. but even so > it should not take that much time. I measured my connection speed > using "speed meter" on 2wire.com website and it shows more than 1MB/s. > > > Am I right that streaming 100 symbols is equivalent to avg internet > transfer of about 10kb/s at the most? > > And, Should the backfill of 100 symbols =3.2Mb be a matter of a few > seconds with internet speed of 1Mb/s (measured)? > > Windows task manager shows 38% CPU (40/60 between IQ and AB) and LESS > than 1% internet bandwidth usage -- WHY is it not using the entire > bandwidth available????????????????? > > Another thing I don't understand is, why with the above numbers my > Core2 Duo PC is nonresponsive when watching 4 charts ?????? > > I have a separate internet connection for AB and my trading platform > because when I run intraday scans AB can cause other applications > running on the same connection to loose the connection. And I have the > fastest connection the money can buy in my area. > > I was complaining to IQFeed, we spend an hour online running tests > and they say that everything looks ok. > > I saw posts from other AB users claiming that they have 8 charts on > the screen on a PC two generations older than mine. I was wonder how > do they manage to trade. > It is my 3rd PC and I always get the same problems. I am not > complaining here about AB because it is still the best program in my > opinion, but I have never seen anyone else using it, so I try to get > some feedback whether I just complain about things not knowing that it > is the way they should be. > > Could someone else share their experience with AB? > > > > ------------------------------------ > > **** IMPORTANT **** > This group is for the discussion between users only. > This is *NOT* technical support channel. > > ********************* > TO GET TECHNICAL 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 > > >
