Yeah, I definitely get your point and I mostly agree. And I probably don't want to write a full RPerl application.

But if I could write my main program in Perl and have my limited CPU intensive part(s) of the code (e.g. deeply nested loops) in RPerl, maybe I could have the best of two worlds: high speed of compiled programs for the CPU intensive part, and the high expressive power of Perl for the rest of the program.