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"Very impressed with the quality of your feed - ******* is a real donkey in comparison." - Comment from A.C. via Email
"I noticed that ******* quotes locked up shortly after the interest rate announcement yesterday while yours stayed stable." - Comment from Ron in Utah
"Everything is working great with the API. I love it." - Comment from Calvin
"I am a hedge fund manager here. It’s funny, I have a Bloomberg terminal and a Bridge feed, but I still like having my DTN feed!" - Comment from Feras
"This is an excellent value, the system is generous (allowing for 500 stocks) and stable (and really is tick-by-tick), and the support is fantastic." - Comment from Shirin via Email
"I was with ******* for 4 years at $230 a month, this is a huge savings for me, GOD BLESS YOU PEOPLE," - Comment from T.S. via Email
"You are either overstaffed or people just don't have problems with your feed because customer support always answers the phone quickly." - Comment from Jay via Email
"I've never had DTN go out on me since switching. ******* would go down a couple times every month when I was using them." - Comment from Bryce in AL.
"If you want customer service that answers the phone, your best bet is IQFeed. I cannot stop praising them or their technical support. They are always there for you, and they are quick. I have used ****** too but the best value is IQFeed." - Comment from Public Forum
"Just a quick one to say I'm very impressed so far :) The documentation for developers is excellent and I've quickly managed to get an app written to do historical downloads. The system is very robust and pretty quick considering the extent of data that's available. The support guys have been very helpful too, in combination with the forums it's been plain sailing so far!" - Comment from Adam
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gcarleu has contributed to 3 posts out of 21191 total posts (0.01%) in 2,222 days (0.00 posts per day).

20 Most recent posts:
IQFeed Developer Support » IQFeed Maximum Messages per Second Apr 4, 2018 01:18 PM (Total replies: 2)

Last try sending the file up.
- Greg

IQFeed Developer Support » IQFeed Maximum Messages per Second Apr 4, 2018 01:16 PM (Total replies: 2)

The file didn't make it up with the original post.
- Greg

IQFeed Developer Support » IQFeed Maximum Messages per Second Apr 4, 2018 01:13 PM (Total replies: 2)

I am getting substantial lags in the IQFeed data. The lags are measured using the timestamp out of IQFeed and comparing it to the system time when the message enters my software.

Of course, there is an offset between the IQFeed clock and my local system clock. My hope is that the time difference would remain fairly constant and during low traffic times of day, it does. However, during high traffic periods, such as the last 30 minutes of trading, the offset varies a lot, sometimes it just keeps increasing.

Does anyone have any information on how many tickers and how many messages per second IQFeed can support?

I have attached a Python 3.6 program that I am using to do the measurement. First, you will need to start IQLinkLauncher and then run the program as "python IQTestClient.py"

Thanks in advance
- Greg


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