The main time consumption of your processing is in the file IO, ie. (as you indicate) the line-by-line parsing, plus writing & generating CRC on an external file;

Is this necessary? Couldn't you just read the transactions one-by-one from the file, and run the CRC-calculation on each XML-trans in memory ?? -- As in (untested) : 
#!/usr/bin/perl -w
use strict;
use warnings;
use String::CRC32;         ### for instance 

my $XmlData = <<XML_DATA;
<Transaction>
    <MessageCode>100</MessageCode>
    <ToAccountNo>12989898900</ToAccountNo>
</Transaction>
<Transaction>
    <MessageCode>200</MessageCode>
    <ToAccountNo>24536485582</ToAccountNo>
</Transaction>
XML_DATA

open my $XmlFile, '<', \$XmlData or die "Can't open XML file: $!";

$/ = "</Transaction>";    ### one trans at-a-time
while ( <$XmlFile> ) {
    my  $crc = crc32($_);
    ### & do whatever needs TBD with the $crc ...
}

[download]

Allan Dystrup

In reply to Re: XML Tags Stripping & Calculating checksum on it by ady
in thread XML Tags Stripping & Calculating checksum on it by harishnuti

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