In very unscientific tests Ruby 2.0 is 60-70% faster than 1.9.3.
Very promising.

PS: I couldn’t get my test suite to run in Ruby 2.0.0 but I managed to run the very simple
“time bundle exec rake environment” test

The average was
– 7.74s for ruby 2.0.0
– 11.8s for ruby 1.9.3-p368, a 65% speed improvment, right in line with the results from the gist
– 17.07s for rubinius 2.0.0 (1.9 variant) … yeah thats slow