[user@host newload]$ ./t-benchdates.pl 500
Benchmark: timing 500 iterations of Date::Manip::Date, Time::Piece...
Date::Manip::Date: 124 wallclock secs (119.35 usr +  1.30 sys = 120.65 CPU) @  4.14/s (n=500)
Time::Piece:  5 wallclock secs ( 3.88 usr +  0.03 sys =  3.91 CPU) @ 127.88/s (n=500)