use Benchmark; my ($fn1,$fn2) = @ARGV; my %benchs; my $cnt = 0; $benchs{section_1}{start} = Benchmark->new(); open(FH,$fn1) or die(); while (my $line1 = ) { $cnt++ if ($line1 =~ /\./); } print "$cnt\n"; close FH; $benchs{section_1}{end} = Benchmark->new(); $cnt = 0; $benchs{section_2}{start} = Benchmark->new(); open(FH,$fn2) or die(); while (my $line2 = ) { $cnt++ if ($line2 =~ /\./); } print "$cnt\n"; close FH; $benchs{section_2}{end} = Benchmark->new(); foreach my $b (keys %benchs) { print "$b: " ,timestr(timediff($benchs{$b}{end}, $benchs{$b}{start})),"\n"; }