nmap udp scan takes too long

[a bv <vbavbalist () gmail com>]

Hi,

Using mosly zenmap , udp scan takes so long mostly . I try to scan all
ports 1-65535 but also i do that at tcp scan too at the same port
range but tcp scan takes too little time according to udp. I start to
udp scan a few local hosts

and after a day when i turn to the screen i see that it gives %40.3
etc and not completed yet (not sure if it still continues to scan).
What can be the reason and what is the best /efficient way to do a udp
scan?


Regards

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