This benchmark uses different methods to check a number of IP addresses against a list of IP ranges. Two of them use Net::Netmask and are predictably slow. One even uses a helper function to call Net::Netmask's match() methods. One method manually defines the required bit shifts and logical OR operations. While this one is the fastest, finding the required numbers can be a pain. The method using Net::IP::Match is only a bit slower than the manual method and much easier to write.

On my Powerbook, using the manual method is only 18% faster than using Net::IP::Raw, but Net::IP::Raw is almost 20 times faster than using Net::Netmask.