[1]: https://github.com/ruby/ruby/compare/v1_9_2_180...v1_9_2_290...
[2]: http://www.rubyinside.com/get-edge-ruby-faster-loading-ruby-...
I figure they didn't include it for a good reason.
[1]: https://github.com/ruby/ruby/compare/v1_9_2_180...v1_9_2_290...
[2]: http://www.rubyinside.com/get-edge-ruby-faster-loading-ruby-...