# JRuby 1.5.0 Released

**URL:** <https://www.ruby-forum.com/t/jruby-1-5-0-released/188492>\
**Category:** Ruby\
**Created:** [May 12, 2010, 10:19pm UTC](https://www.ruby-forum.com/t/jruby-1-5-0-released/188492 "2010-05-12T22:19:28Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![nicksnels](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/aca169/32.png) [@nicksnels](https://www.ruby-forum.com/u/nicksnels)\
**Post date:** [May 12, 2010, 10:19pm UTC](https://www.ruby-forum.com/t/jruby-1-5-0-released/188492/1 "2010-05-12T22:19:28Z")

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The JRuby community is pleased to announce the release of JRuby 1.5.0.

- Homepage: [http://www.jruby.org/](http://www.jruby.org/)
- Download:  
[http://www.jruby.org/download](http://www.jruby.org/download)

This development cycle has been our longest cycle yet (nearly 5 months),  
but it also has the most fixes. It also includes many new notable  
features (see below). Most of our bug fixes have been more of what we  
consider fine-tuning, since we keep getting into smaller corner-cases of  
compatibility for individual Ruby methods. In that sense, we expect if  
you had a good experience with JRuby 1.4.0 then 1.5.0.RC3 will be a  
no-brainer upgrade. If you haven’t tried JRuby in a while with your  
application, then please give us another try. Odds are whatever issue  
you were having before no longer exists! And we would really like help  
making sure JRuby 1.5.0 final is a solid release…so please try and  
report back with any problems.

### 1.5.0 Highlights:

- New native access framework designed for performance and better FFI  
support
- Native launcher for \*NIX platforms
- Ant support and Rake-Ant integration
- Better and better support for Windows
- Multiple performance improvements for Ruby-to-Java calling, improving  
correctness, memory, and speed.
- Embedding API improvements based on user input (JSR-223, BSF,  
RedBridge, etc)
- Software updates: Ruby 1.8.7 standard library update, RubyGems 1.3.6,  
RSpec 1.3.0
- ruby-debug installed by default
- Many fixes for Rails 3
- Various improvements to startup time
- Improved performance for Object#object\_id/\_\_id\_\_
- Reduced memory use for Java class metadata and faster loading of Java  
classes
- jar-in-jar support in the classloader
- The “open4” library now works properly
- jruby.jit.codeCache=dir to save jitted scripts/methods to disk in a  
sha1-hashed .class file
- New logic for interface implementation that produces “real” classes
- jruby.ji.objectProxyCache to turn off OPC for extra performance
- JRuby::Synchronized module for making a class and its subclasses 100%  
synchronized on all calls
- Miscellaneous perf improvements to core classes and minor improvements  
in the JIT
- No more ObjectSpace during IRB
- Cleaned up maven artifacts
- Windows Installer fixes for x64 and Windows 7 security
- Over 1250 commits since JRuby 1.4

We always appreciate community contributions. This cycle we’ve had more  
help than ever: David C., Stephen B., Daniel Luz, Ian D.,  
Koichiro Ohba,  
Hongli L., Hiroshi N., Colin Jones, Takeru Sasaki, Roger P.,  
Matjaz Gregoric, Joseph LaFata, Frederic J., Alex Coles, Lars  
Westergren