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Re:Java 7 is now available by peterb on Thursday July 28, 2011 @01:04PM (#2817757)
Indeed, As Charles Nutter (JRuby) wrote:

"There’s a very real chance that invokedynamic could improve JRuby performance many times, putting us on par with our statically-typed brothers like Java and Scala. And that means you can write Ruby code without fear. Awesome."

http://www.engineyard.com/blog/2011/jruby-1-6-released-now-w...

Re:Java 7 is now available by jamesgeck0 on Thursday July 28, 2011 @03:00PM (#2818377)
So invokedynamic is already wired into JRuby? I can just install the Java 7 runtime and see significant performance improvements?
Re:Java 7 is now available by peterb on Thursday July 28, 2011 @07:20PM (#2819412)
JRuby 1.7 has the major Invokedynamic changes. You can play with trunk for now.