modperl

http://www.debian-administration.org/article/A_brief_introduction_to_mod_perl_-_Part_1

lenny:~# apt-get install libapache2-mod-perl2
lenny:~# a2enmod perl
lenny:~# /etc/init.d/apache2 restart
=== BEGIN /etc/apache2/conf.d/perl-status ===
 #
 # make status information available at
 #   http://example.com/perl-status/
 #
 <Location /perl-status>
    SetHandler perl-script
    PerlHandler +Apache2::Status
 </Location>

 #
 # But only from the local host, and our trusted
 # remote IP.
 #
 <Location /perl-status>
    order deny,allow
    deny from all
    allow from 127.0.0.1
    allow from your.ip.address
 </Location>
=== END ===

Because mod_perl embeds a persistent copy of Perl inside the Apache webserver you can use this embedded copy of perl to run your existing perl-based CGI scripts faster. This speedup comes from avoiding the overhead of launching a new copy of the Perl interpreter when an incoming CGI request is to be handled, to get a more impressive speedup requires making changes to your script(s).

=== BEGIN into site configuration ===
  PerlModule Apache::Registry
  Alias /cgi-bin/ /usr/lib/cgi-bin
  <Location /cgi-bin>
    SetHandler perl-script
    PerlHandler Apache::Registry
    PerlSendHeader On
    Options +ExecCGI
  </Location>
=== END ===