#!/usr/bin/perl
use strict;
use warnings;
use Perl6::Slurp;
use Benchmark qw(cmpthese :hireswallclock);

# write file with different line endings
# \r = 0x0D
# \n = 0x0A
my $win_line = "Windows\r\n";
my $unix_line = "Unix\n";
my $mac_line = "Mac\r";

my @strings = ();
for (1 .. 1000)
{
        push @strings, $win_line;
        push @strings, $unix_line;
        push @strings, $mac_line;
        push @strings, $win_line;
        push @strings, $mac_line;
        push @strings, $win_line;
        push @strings, $unix_line;
}

open(my $fh, ">", "le_big.txt") or die "Failed file open: $!";
binmode($fh);
print $fh $_ foreach @strings;
close($fh);

cmpthese(1000, {
                                'naive'         => \&naive,
                                'original'      => \&original,
                                'local split'   => \&local_split,
                                'crlf split'    => \&crlf_split,
                        });


# Original code
sub original {
        my @results = slurp("<:crlf", "le_big.txt", {irs => qr/\n|\r/, chomp => 1});
        return @results;
}
# Just use slurp and crlf to read the file
sub crlf_split {
        my @initial_results = slurp("<:crlf", "le_big.txt");
        my @results = map split(/\r/), @initial_results;
        return @results;
}
# Just use slurp to read the file
sub local_split {
        my @initial_results = slurp("<", "le_big.txt");
        my @results = map split(/\n|\r\n?/), @initial_results;
        return @results;
}
# Naive local implementation
sub naive {
        open(my $fh, "<", "le_big.txt") or die "Failed file open: $!";
        local $/;
        my $slurp = <$fh>;
        close $fh;
        my @results = split /\n|\r\n?/, $slurp;
        return @results;
}