h:\>perl benchmark.pl
perl benchmark.pl
Benchmark: timing 100000 iterations of trimall_v1, trimall_v2...
trimall_v1: 13 wallclock secs (13.29 usr +  0.00 sys = 13.29 CPU)
trimall_v2: 12 wallclock secs (11.74 usr +  0.01 sys = 11.75 CPU)