using read function
0.684900999069214
0.681570053100586
0.680304050445557
0.675194025039673
0.684563159942627
0.686581134796143

File::Slurp
1.57559299468994
1.5706889629364
1.5739688873291
1.5618691444397
1.56290698051453
1.58691692352295

##</code><code>##

open(FILE,"<$file") || die $!;
my $data = do { local $/; <FILE> };
close(FILE);

##</code><code>##

my $data = read_file($file);