Perl & mod_perl

Perl is a script programming language that is similar in syntax to the C language and that includes a number of popular UNIX facilities such as sed, awk, and tr. Perl is an interpreted language that can be compiled just before execution into either C code or cross-platform byte-code. When compiled, a Perl program is almost (but not quite) as fast as a fully precompiled C language program. Perl is regarded as a good choice for developing Common Gateway Interface (CGI) programs because it has good text manipulation facilities (although it also handles binary files). It was invented by Larry Wall.

In general, Perl is easier to learn and faster to code in than the more structured C and C++ languages. Perl programs can, however, be quite sophisticated. Perl tends to have devoted adherents.

  Plug-ins can be installed for some servers (mod_perl for Apache, for example) so that Perl is loaded permanently in memory, thus reducing compile time and resulting in faster execution of CGI  Perl scripts.