RPerl is an upgrade to the popular Perl 5 programming language. RPerl gives software developers a compiler to make their apps run really fast on parallel computing platforms like multi-core processors, the cloud, clusters, and supercomputers. RPerl stands for Restricted Perl, in that we restrict our use of Perl to those parts which can be made to run fast. RPerl also stands for Revolutionary Perl, in that we hope RPerl's speed will revolutionize the software development industry. RPerl might even stand for Roadrunner Perl, in that it RUNS REALLY FAST.