I have a problem with file size calculation when I create .xls file using Spreadsheet::WriteExcel
File is created properly and after that I want to email that file to customer.
When I tried to print the file size once its created, getting "0" size.
if I check that in directory, I can see the file with exact size.
Can anyone tell me what's wrong in this code and how to resolve this issue?
Here is my code

use strict;
use Spreadsheet::WriteExcel;

# Create a new Excel workbook called result.xls
my $workbook = Spreadsheet::WriteExcel->new("result.xls");

# Add some worksheets
my $sheet = $workbook->add_worksheet("Example");

# Add a Format
my $format = $workbook->add_format();

$format->set_align('left');

# Set the width of the column in Sheet
$sheet->set_column(0, 5, 30);

# Set Sheet as the active worksheet
$sheet->activate();

open(FH,"<file1.csv") or die "Cannot read\n";
        my($row)=0;
        while (<FH>) {
                chomp($_);
                my(@info) = split(/,/,$_);

                my $col = 0;
                foreach my $token (@info) {
                        $sheet->write($row, $col, $token, $format);
                        $col++;
                }
        $row++;
        }
close(FH);

print "Before sleep\n";
sleep(10);
my $filesize = -s "result.xls";
print "Size: $filesize\n";
exit;
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