#!/usr/bin/perl -w
use strict;

use Benchmark;

my $file = $0;
open IN, $file or die "$file: $!\n";

sub joinit { my $content = join '', <IN>; }

sub dollarslash { my $content = do { local $/; <IN> } }

timethese(100_000, {join => \&joinit,
                    slash => \&dollarslash} );