It's neat, but it's slower than using split: 
use Benchmark qw(cmpthese);

my $str = 'wwibblewibblewibblewibbleibblewibblewibblewibble';
cmpthese -1, {
    regex => sub { () = $str =~ /(?=(..))/g },
    substr => sub { () = map { substr $str, $_, 2 } (0 .. length($str)
+ - 2) },
};

          Rate  regex substr
regex  13917/s     --   -30%
substr 19910/s    43%     --

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In reply to Re^3: dice's coefficient by Anonymous Monk
in thread dice's coefficient by locked_user zanruka

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