The Perl support, provided by the module with the same name, offers two
ways of using Perl with Roxen: running Perl scripts and running
in-line Perl code. The script support caches scripts so they (and the
Perl interpreter) do not need to be reloaded every time the script
runs. The in-line Perl code support allows running snippets of Perl
code inside <perl>...</perl> containers in RXML
pages or within <?perl ... ?> processing instructions.
See Using In-Line Perl Code, Running Perl Scripts and
Supported mod_perl API Methods.