Nmap Top Port Scan Performance Options

• --host-timeout: (Asks Nmap to give up on hosts that take more than the given amount of time to scan)
• --max-retries: (Specifies the maximum number of port scan probe retransmissions to a single port)
• --min_rtt_timeout:, --max_rtt_timeout:, --initial_rtt_timeout: (Amount of time that Nmap will wait for a port scan probe response)
• --min-rate, --max-rate (The min and max number of probe packets Nmap sends per second
• --min_parallelism:, --max_parallelism: (Number of port scan probes (across all hosts scanned concurrently) that Nmap may have outstanding)
• --scan_delay:, --max-scan-delay: (Amount of time between sending probes to any individual host (the scan delay can grow as Nmap detects packet loss, so a maximum may be specified)