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The JRuby community is pleased to announce the release of JRuby 0.9.9.

Homepage: http://www.jruby.org/
Download: http://dist.codehaus.org/jruby/

This release has largely been a stabilization release where we have spent
more focus on Ruby compatibility.  We are gearing up for a 1.0 release.  Here
are some of the more significant acheivements for 0.9.9:

  • Major compatibility and performance overhaul of String, Array, Hash
  • Many YAML and Marshalling issues have been fixed
  • Java Integration overhaul fixing many outstanding issues
  • 180 Jira issues resolved
  • Several more bottlenecks removed
  • Rails applications like Mephisto and plugins like Goldberg are running without hitches
  • Performance has improved by 40% over 0.9.8 based on YARV benchmarks
    With all the hard work done by Marcin Mielżyński and Bill Dortch we are adding
    them as core committers.  Their contributions have made a huge difference in
    our progress as of late.

We also want to thank all people who hang out on IRC, triage/report/patch
issues, and communicate on our mailing lists.  Their interest has really
helped shape JRuby into a better implementation.

Please take JRuby 0.9.9 for a spin and help us root out the last issues
before our 1.0 release!