Adding use warnings; results in

Use of uninitialized value in split at foo.pl line 9.

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Hmmm... adding (-l and) print $entries to both subs results in:

Use of uninitialized value in split at foo.pl line 9.
0
Use of uninitialized value in pattern match (m//) at foo.pl line 14.
0

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Now,

#!/usr/bin/perl

use strict;
use warnings;
use Benchmark qw(:all :hireswallclock);

my $str="This is an example string with several words bla bla bla";

sub test1 () {
    local $_=$str;
    my $entries = @{[ split ]};
}

sub test2 () {
    local $_=$str;
    my $entries = () = /\S+/g;
}

cmpthese -10, {
    deref => \&test1,
    goatse => \&test2,
};

__END__

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results in

          Rate goatse  deref
goatse 16325/s     --   -42%
deref  28017/s    72%     --

[download]

In reply to Re^5: Counting the number of items returned by split without using a named array by blazar
in thread Counting the number of items returned by split without using a named array by Anonymous Monk

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