Let me try to explain this a little bit better. My file contains 21 million URLs that our search engine has indexed on a Intranet. I have been tasked to check each URL against a "blacklist" file to see if the URL matches or not. I need to output a report that shows each host, #of URLs, # Not Blacklisted, % Not Blacklisted, # Blacklisted, & % Blacklisted.

I have an array of blacklisted regular expressions and couple of hashes for not blacklisted and blacklisted.

open(MYINFILE< $URLLIST) || die;
while ( my $url = <MYINFILE> ) {
  chomp($url);
  if ($url ne "") {
    my ($host)=GetHost($url);
    my ($blacklisted) = isBlackListed($url);
    if ($blacklisted) {
      $BLACKLISTED{$host}++;
    } else {
      $NOTBLACKLISTED{$host}++;
    }
  }
printReport

I was hoping that using threads and sharing the Arrays and Hashes would speed up the processing of this file. I may want to break up the file into several files, maybe 1 host per file and process each file independently. At the end, build a complete report from each output.

In reply to Re^2: Processing large file using threads by mjacobson
in thread Processing large file using threads by mjacobson

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