Why are we even comparing JRuby and Ruby 1.8? Ruby 1.9.3 is the last version and Ruby 1.9 is much faster than Ruby 1.8.
In a benchmark from last year JRuby and 1.9 were about equally fast with 1.9 the winner in most cases. With the recent improvements in JRuby I believe JRuby is faster but I have no idea about how much.
EDIT: Note that Ruby 1.9 gained in performance compared to 1.8 due to the introduction of a new Ruby targeted VM, YARV. Previously I believe it ran directly on the AST.
Why are we even comparing JRuby and Ruby 1.8? Ruby 1.9.3 is the last version and Ruby 1.9 is much faster than Ruby 1.8.
In a benchmark from last year JRuby and 1.9 were about equally fast with 1.9 the winner in most cases. With the recent improvements in JRuby I believe JRuby is faster but I have no idea about how much.
http://programmingzen.com/2010/07/19/the-great-ruby-shootout...
EDIT: Note that Ruby 1.9 gained in performance compared to 1.8 due to the introduction of a new Ruby targeted VM, YARV. Previously I believe it ran directly on the AST.