Performances Regression between older versions (0.41) and latest (0.51)

[ulysse31]

Hello,

There is a clear performance regression on the latest version (0.51, available on debian trixie) and older ones (such as 0.41):
Under the same host, with same perl version (debian trixie) :

root@none /tmp # time ./ipcalc.0.41 10.42.42.0/24
Address: 10.42.42.0 00001010.00101010.00101010. 00000000
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Wildcard: 0.0.0.255 00000000.00000000.00000000. 11111111
=>
Network: 10.42.42.0/24 00001010.00101010.00101010. 00000000
HostMin: 10.42.42.1 00001010.00101010.00101010. 00000001
HostMax: 10.42.42.254 00001010.00101010.00101010. 11111110
Broadcast: 10.42.42.255 00001010.00101010.00101010. 11111111
Hosts/Net: 254 Class A, Private Internet

./ipcalc.0.41 10.42.42.0/24 0.00s user 0.00s system 95% cpu 0.009 total
root@none /tmp # time ./ipcalc.0.51 10.42.42.0/24
Address: 10.42.42.0 00001010.00101010.00101010. 00000000
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Wildcard: 0.0.0.255 00000000.00000000.00000000. 11111111
=>
Network: 10.42.42.0/24 00001010.00101010.00101010. 00000000
HostMin: 10.42.42.1 00001010.00101010.00101010. 00000001
HostMax: 10.42.42.254 00001010.00101010.00101010. 11111110
Broadcast: 10.42.42.255 00001010.00101010.00101010. 11111111
Hosts/Net: 254 Class A, Private Internet

./ipcalc.0.51 10.42.42.0/24 0.13s user 0.01s system 99% cpu 0.141 total
root@none /tmp #

This may seem subtle to many, but if ipcalc is used as a subroutine on a script ... it is quite impacting.