#! perl -slw
use strict;
use threads;
use threads::shared;
use Thread::Queue;
use Storable qw[ freeze thaw ];
use Data::Dump qw[ pp ]; $Data::Dump::WIDTH = 2000;

our $N //= 1000;
our $H //= 100;

{
    my $start = Win32::GetTickCount();
    my $Q = new Thread::Queue;
    async{
        my %h = 1 .. $H;
        $Q->enqueue( \%h ) for 1 .. $N;
        $Q->enqueue( undef );
    }->detach;
    my %h;
    %h = %{ $_ } while defined( $_ = $Q->dequeue );
    printf "Unshared hashrefs: %.3f\n",
        ( Win32::GetTickCount() - $start ) / 1000;
}


{
    my $start = Win32::GetTickCount();
    my $Q = new Thread::Queue;
    async{
        my %h = 1 .. $H;
        $Q->enqueue( join $;, %h ) for 1 .. $N;
        $Q->enqueue( undef );
    }->detach;
    my %h;
    %h = split $;, $_ while defined( $_ = $Q->dequeue );
    printf "join/split: %.3f\n",
        ( Win32::GetTickCount() - $start ) / 1000;
}

{
    my $start = Win32::GetTickCount();
    my $Q = new Thread::Queue;
    async{
        my %h = 1 .. $H;
        $Q->enqueue( freeze \%h ) for 1 .. $N;
        $Q->enqueue( undef );
    }->detach;
    my $href;
    $href = thaw $_ while defined( $_ = $Q->dequeue );
    printf "freeze/thaw: %.3f\n",
        ( Win32::GetTickCount() - $start ) / 1000;
}

{
    my $start = Win32::GetTickCount();
    my $Q = new Thread::Queue;
    async{
        my %h :shared = 1 .. $H;
        $Q->enqueue( \%h ) for 1 .. $N;
        $Q->enqueue( undef );
    }->detach;
    my $href;
    1 while defined( $href = $Q->dequeue );

    printf "Shared hashrefs: %.3f\n",
        ( Win32::GetTickCount() - $start ) / 1000;
}