Why make another copy of the array with @{[ ... ]}? I would rather do this instead -

$n =  scalar( split ',', $str );
print "$n\n";
[download]

Ok, lets give it a test -

use strict;
use Benchmark qw/timethese cmpthese/;

my $str = join ',',map{('a'..'z')[rand 26] x (1 + rand 5)}0..1000;

cmpthese( timethese(10000, {
        'split_anonymous' => '&split_anonymous',
        'split_simple' => '&split_simple',
    }) );

sub split_anonymous
{
    my $n = @{[split ',', $str]};
    #print "$n\n";
}

sub split_simple
{
    my $n = scalar split ',', $str;
    #print "$n\n";
}
[download]

And the comparison -

Benchmark: timing 10000 iterations of split_anonymous, split_simple...

split_anonymous: 19 wallclock secs (19.05 CPU) @ 525.02/s (n=10000)
split_simple: 16 wallclock secs (15.77 CPU) @ 634.32/s (n=10000)

                 Rate split_anonymous    split_simple
split_anonymous 525/s              --            -17%
split_simple    634/s             21%              --
[download]

The benchmark result show that a simple split without making an anonymous copy is 20% faster.

---

---

• Are you posting in the right place? Check out Where do I post X? to know for sure.
• Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:

  <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>

• Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
• Want more info? How to link or How to display code and escape characters are good places to start.