Active ports may well respond more quickly than that, but for inactive ports NMap will have to wait a certain amount of time before it times the port out and concludes it is not active.
Closed ports are also reported immediately, unless they're blocked by a firewall. Stop portscanning people's firewalls! What's wrong with you?

In reply to Re^2: NMAP Parser very slow by Anonymous Monk
in thread NMAP Parser very slow by Noosrep

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