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use strict;
use warnings;
use Benchmark;
my $r;
my @a = qw/ aaa bbb aaa bbb aaa /;
my @b = qw/ fff fff fff fff fff /;
Benchmark::cmpthese -1, {
diff => sub {
for my $s (@a) {
$r = qr/$s/;
same => sub {
for my $s (@b) {
$r = qr/$s/;
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