The Apache mod_perl Module
The Apache Web server is built using a group of programs referred to as modules. When the Apache Web server receives a request for a particular document, it is sent to several modules, which check to see whether they are supposed to handle the request. To extend the Apache Web server, a user can write new modules in C. Of course, writing new modules in C to extend the functionality of your Web server is not an easy task.
On the other hand, a particular module called mod_perl combines the Perl interpreter with the Apache server. Among other things, this enables you to run your Perl CGI scripts using the mod_perl module, which eliminates the overhead of starting Perl and compiling your scripts every time they’re requested. ...
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