User since: Nov 28, 2000 at 00:33 UTC (25 years ago) Last here: Sep 13, 2005 at 20:12 UTC (20 years ago) Experience: 8932 Level: Parson (16) Writeups: 928 CPAN ID: CHIPMUNK Location: Boston.pm User's localtime: Aug 06, 2025 at 18:47 -05 Scratchpad: View For this user: Search nodes

#!perl -w

use strict;

use Benchmark;

Benchmark->import(qw/cmpthese/) if $^V;

my $time = shift || 2;


my $str = 'StRiNg';
my $var = 'sTrInG';


my %bms = (
           reoi => sub { $str =~ /^\Q$var\E\z/oi },
           rei  => sub { $str =~ /^\Q$var\E\z/i },
           lc   => sub { lc($str) eq lc($var) },
          );

if ($^V) {
  cmpthese(-$time, \%bms);
} else {
  timethese(-$time, \%bms);
}
__END__
Benchmark: running lc, rei, reoi, each for at least 2 CPU seconds...
        lc:  5 wallclock secs ( 2.11 usr + -0.02 sys =  2.09 CPU) @ 56
+4093.78/s (n=1178956)
       rei:  5 wallclock secs ( 2.01 usr +  0.00 sys =  2.01 CPU) @ 19
+5359.20/s (n=392672)
      reoi:  5 wallclock secs ( 2.26 usr +  0.02 sys =  2.28 CPU) @ 61
+1101.32/s (n=1393311)
         Rate  rei   lc reoi
rei  195359/s   -- -65% -68%
lc   564094/s 189%   --  -8%
reoi 611101/s 213%   8%   --
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