Rate transliterate  substitution
transliterate 1011345/s            --          -49%
substitution  1969797/s           95%            --

##</code><code>##

use Benchmark qw(:all);

$toto = 'this+is+my+text+and+here+is+more+and+more+this+is+my+text+and+here+is+more+and+more+this+is+my+text+and+here+is+more+and+more';
$count =-5;


$results = timethese($count, 
            {
                'transliterate' => sub { $toto = 'this+is+my+text+and+here+is+more+and+more+this+is+my+text+and+here+is+more+and+more+this+is+my+text+and+here+is+more+and+more'; $toto =~tr/+/ /; },
                'substitution' => sub { $toto = 'this+is+my+text+and+here+is+more+and+more+this+is+my+text+and+here+is+more+and+more+this+is+my+text+and+here+is+more+and+more'; $toto =~s/\+/ /g; },
            },
            'none'
        );
        cmpthese( $results ) ;

exit 0;        


##</code><code>##

                  Rate  substitution transliterate
substitution   73807/s            --          -88%
transliterate 625256/s          747%            --