Hmm.... there are some inherent delays in the way Myriad starts new items but these should be a lot smaller than you are seeing, but one possible thing is the tcp setup/teardown time. Have you tried turning on the option to "leave the connection open" and "re-use existing" ? This would be the usual delay on the first connection, but after that it would much faster.
Also, make sure debug mode is turned off as that can slow things down too.
What is the device receiving the commands and do you have control over what messages it's expecting or are they hard coded?
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