This module is designed to provide an extremely lightweight way to parse 
moderately complex configuration files. As such, it exports a single 
function - fastconfig() - and does not provide any OO access methods. 
Still, it is fairly full-featured.

Here's how it works:

    %cf = fastconfig($file, $delim);

Basically, the fastconfig() function returns a hash of keys and values 
based on the directives in your configuration file. By default, directives 
and values are separated by whitespace in the config file, but this can be 
easily changed with the delimiter argument (see below).

When the configuration file is read, its modification time is first 
checked and the results cached. On each call to fastconfig(), if the 
config file has been changed, then the file is reread. Otherwise, the 
cached results are returned automatically. This makes this module great 
for mod_perl modules and scripts, one of the primary reasons I wrote it. 
Simply include this at the top of your script or inside of your 
constructor function:

    my %cf = fastconfig('/path/to/config/file.conf');

If the file argument is omitted, then fastconfig() looks for a file named 
$0.conf in the ../etc directory relative to the executable. For example, 
if you ran:

    /usr/local/bin/myapp

Then fastconfig() will automatically look for:

    /usr/local/etc/myapp.conf

This is great if you're really lazy and always in a hurry, like I am.

If this doesn't work for you, simply supply a filename manually. Note that 
filename generation does not work in mod_perl, so you'll need to supply a 
filename manually.

WWW: http://search.cpan.org/dist/Config-Fast/