Platypus is a Perl library for creating interfaces to machine code libraries written in languages like C, C++, Fortran, Rust, Pascal. Essentially anything that gets compiled into machine code. This implementation uses libffi to accomplish this task. libffi is battle tested by a number of other scripting and virtual machine languages, such as Python and Ruby to serve a similar role. There are a number of reasons why you might want to write an extension with Platypus instead of XS.