Hi, I'm using Spreadsheet::XLSX to parse the xlsx file. for around 20000 rows , the memory it takes around 800 MB, though size of file is 5 MB. Can anybody helps me to optimize it? following is the code:

my ($self, $in_file, $out_file) = @_;
    $count = @_;
    $count -= 1;
    if(2 != $count) {
        util->logit("[$PARENT_PROC_NAME]: xlsx_to_csv:invalid args [@_
+] [$count]");
        return $FAILURE;
    }
    my $excel = Spreadsheet::XLSX -> new ($in_file);
    my $line;
    my $out_csv_name = $out_file;
    my $orig_out_file = $out_csv_name;

    #binmode CSV;
    binmode CSV, ":utf8";
    my $Csv = Text::CSV_XS->new({
        'quote_char'  => '"',
        'escape_char' => '"',
        'sep_char'    => ',',
        'binary'      => 1,
    });
    my $i = 1;
    foreach my $sheet (@{$excel -> {Worksheet}}) {
        $i++;
        $out_csv_name = "$orig_out_file$underscore$sheet->{Name}.csv";
        #$out_csv_name =~ s/\s+//g;
        @ret_array[$i] = $out_csv_name;
        open CSV, "> $out_csv_name" || die "Cannot create csv file: $!
+" ;
        $sheet -> {MaxRow} ||= $sheet -> {MinRow};
        foreach my $row ($sheet -> {MinRow} .. $sheet -> {MaxRow}) {
            my @Row;
            $sheet -> {MaxCol} ||= $sheet -> {MinCol};
            foreach my $col ($sheet -> {MinCol} ..  $sheet -> {MaxCol}
+) {
                my $cell = $sheet -> {Cells} [$row] [$col];
                my $Value = "";
                if ($cell) {
                    #$Value = $cell->Value; #rounds off
                    #$Value = $cell->{_Value}; #rounds off
                    #$Value = $cell->Value(); #rounds off
                    #$Value = $cell->{Val};
                    $Value = $cell->unformatted(); 
                    #my $avl = $sheet->{Cells}[$row][$col]{Val};
                    #print "avl:[$avl]\n";
                    #$Value = $cell->value();
                    if ($Value eq 'GENERAL') {
                        $Value = $cell->{Val};
                    }
                }
                last if $col == $sheet->{MinCol} and !$Value;
                push(@Row, $Value);
            }
            next unless @Row;
            my $Status = $Csv->combine(@Row);
            if (!defined $Status) {
                my $Error = $Csv->error_input();
                warn "ERROR FOUND!: $Error";
            }
            if (defined $Status) {
                my $Line = $Csv->string();
                print CSV "$Line\n";

            }
[download]

I don't know how to do it...I'm new to perl. Kindly guide me.

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