Hosted on MSN

Ruby 4.0 update brings ZJIT, isolation features, and more

The Ruby programming language continues its tradition of delivering major updates on Christmas Day, announcing the release of Ruby 4.0.0, which introduces two massive new experimental features: the ...
GIGAZINE

Ruby 4.0.0 released, adding new features such as the new JIT compiler ZJIT and Ruby Boxes for isolating class definitions

Ruby Box is an experimental feature that separates and isolates definitions such as classes, and can be enabled by specifying the environment variable 'RUBY_BOX=1.' Definitions loaded in a box are ...
heise online

Ruby 4.0: A lot of restructuring under the hood, few new features

The new major version with a new JIT compiler, a revised parallelization API, and a maturing type system paves the way for the next decade. On December 21, 2025, the Ruby language turned 30 years old ...
InfoWorld

Ruby 4.0.0 introduces ZJIT compiler, Ruby Box isolation

Ruby 4.0.0 has arrived as the newest release of the interpreted, object-oriented Ruby programming language. The update features a new just-in-time compiler, ZJIT, and an experimental “Ruby Box” ...