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Offhand, I would say that DSL and a slower feed is fine. It seems more
important in who your data-stream supplier is and how jugged up his requests get
and how he gets his data. You can have a fast download speed, but a slow
supplier depending on how he is parsing out his requests.
Next, would be the speed of your own computer dynamics, your available RAM,
and disk access speed, contributing to your overall CPU usage. So overall I
would think you are getting your data within a fraction of a second. To be
worrying about something on the order of a few microseconds is not worth it.
More important would be the reliability and dependability of your feed and
overall computer connection.
Submitting an order electronically seems to take less than a second, and to
get a market order filled and confirmed about a second and a half.
Perhaps, the exchanges who provide the electronic order processing would be
able to give a better answer.
Zait
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