~/work/perl-bench/grep-vs-first.pl 1000 1000
Benchmark: running Grep, Util for at least 1 CPU seconds...
      Grep:  1 wallclock secs ( 1.08 usr +  0.00 sys =  1.08 CPU) @ 1382.41/s (n=1493)
      Util:  1 wallclock secs ( 1.10 usr +  0.00 sys =  1.10 CPU) @ 813.64/s (n=895)