This lecture covers issues and solutions to writing a fast mod_perl application compatible with other environments, and is used to speed up a Perl application. Topics include how to deal with database connection caching, registering cleanup handlers, as well as general coding techniques across many persistent Perl interpreters.

Mod_perl is one of the most popular engines for producing fast web apps. But there are other players out there including SpeedyCGI, FastCGI, Velocigen, and PerlEx. Unfortunately, they all have differences in how they handle issues of executing a persistent Perl program compared to mod_perl.