The long awaited Ruby virtual machine shootout is here. In this report I’ve compared the performances of several Ruby implementations against a set of synthetic benchmarks. The implementations that I tested were Ruby 1.8 (aka MRI), Ruby 1.9 (aka Yarv), Ruby Enterprise Edition (aka REE), JRuby 1.1.6RC1, Rubinius, MagLev, MacRuby 0.3 and IronRuby. Disclaimer Just as with the previous shootout, befor