JRuby Community Releases JRuby 1.6 Release Candidate 1
Additionally, this release provides Ruby 1.9.2 language and API compatibility. JRuby 1.6 RC1 includes incremental performance improvements such as faster libraries, and integrates more seamlessly with the latest release of Ruby on Rails, version 3.0.
The JRuby community believes that this release will provide Windows-based Ruby users with the best experience yet. This release focuses on general performance and scalability improvements, along with the addition of support for RubyGems 1.4.2.