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»Forums Index »Archive (2017 and earlier) »IQFeed Developer Support »Historical requests - speed of retrieval

Author	Topic: Historical requests - speed of retrieval (5 messages, Page 1 of 1)
fredericf -Interested User- Posts: 19 Joined: Aug 1, 2018	Posted: Sep 21, 2018 02:18 AM Msg. 1 of 5 Hi Tim, When making requests for historical data, I pack my requests all in one (let's say 50 requests in the same string, separated by \n) and I send it over to IQFeed. I then receive the 50 answers, one by one, approximately 0.5 sec apart from each other. So it takes about 20 seconds to receive the 50 answers. Q: Is such a speed normal? I find it rather slow compared to what we can receive with the live feed. Q: Is there any way to speed it up? Thanks! Frederic
DTN_Tim Walter -DTN Guru- Posts: 1238 Joined: Apr 25, 2006	Posted: Sep 21, 2018 03:32 AM Msg. 2 of 5 Hi Frederic, If you create 15 sockets, then you can do 15 requests at any 1 time which should get you down to just a few seconds.15 is the maximum number of history requests we allow at any 1 time. Tim
fredericf -Interested User- Posts: 19 Joined: Aug 1, 2018	Posted: Sep 21, 2018 06:06 AM Msg. 3 of 5 So, I understand the transfer speed I am experiencing is normal, and multiple sockets is the way to go to make it higher. Reducing retrieval time by a factor 15 would be very nice indeed! I have not managed multiple sockets before, I will look into this asap. Thank you for the very useful answer! Frederic
DTN_Tim Walter -DTN Guru- Posts: 1238 Joined: Apr 25, 2006	Posted: Sep 21, 2018 07:19 AM Msg. 4 of 5 Happy to. Butm yes that is normal, the requests happen in line, they are not sent in as a batch. So you have a lot of extra transfer latency dragging things down on top of the sequential processing. Tim
fredericf -Interested User- Posts: 19 Joined: Aug 1, 2018	Posted: Sep 21, 2018 02:02 PM Msg. 5 of 5 This makes sense. Have a nice weekend! Frederic