Thanks. If you've the inclination to indulge me a little further, what results do you get from the following? 

use strict;
use warnings;
use threads;

my $str = 'x' x 32_000_000;

sub fork_wait {
    my $pid = fork;
    if ($pid) {
        wait;
    }
    else {
        my $l = length( $str );
        exit 0;
    }
}

sub create_thread_join {
    threads->create( sub { my $l = length( $str ) } )->join;
}

use Benchmark qw( cmpthese );

cmpthese - 3,
  {
    Forks   => \&fork_wait,
    Threads => \&create_thread_join,
  };

[download]

In reply to Re^5: while reading a file, transfer the same data to two different processes. by BrowserUk
in thread while reading a file, transfer the same data to two different processes. by avanta

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