YARV


YARV is a bytecode interpreter that was developed for the Ruby programming language by Koichi Sasada. The goal of the project was to greatly reduce the execution time of Ruby programs.
Since YARV has become the official Ruby interpreter for Ruby 1.9, it is also named KRI, in the same vein as the original Ruby MRI, named for Ruby's creator Yukihiro Matsumoto.

Performance

Benchmarks by rubychan.de showed significant increases in performance. Benchmarks by Antonio Cangiano showed an average four times speed improvement over the original interpreter. Both evaluations comprised a mix of mostly synthetic benchmarks.

History

YARV was merged into the Ruby Subversion repository on January 1, 2007. It was released as part of Ruby 1.9.0 on December 26, 2007, replacing Ruby MRI.