Writing a CGI program with mod_perl is more complex than writing a CGI program with perl. It was a very daunting task for me to have to 'port' my code over to mod_perl.What I did instead was use a module called Apache::PerlRun, you won't get the same performance increase as if you written your CGI with mod_perl, but if helps.

What I think it does is compiles your perl code and keeps it resident in memory.

here's the entry in my httpd.conf:

<Location /cgi-bin>
        SetHandler      perl-script
        PerlHandler     Apache::PerlRun
        PerlSendHeader  On
        Options         +ExecCGI
</Location>
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