Ruby on Rails, the two-decades-old web development framework, features better production defaults and development container configuration in the just-released 7.2 version, according to proponents.
Announced on August 10, Ruby on Rails 7.2 offers improved production defaults for building more- efficient applications. Rails proponents cited a few changes. The Ruby language’s JIT compiler, YJIT, is now enabled by default if running Ruby 3.3 or newer, and the number of default threads in the Puma web server was changed from five to three. This improves latency by reducing the time Ruby spends waiting for the Global VM Lock (GVL) to release when the thread count is too high. Additionally, the default Dockerfile generated by Rails now includes the jemalloc allocator.
For development containers, Rails 7 now can generate a development container configuration for an application. The configuration includes a .devcontainer folder with a Dockerfile, a docker-compose.yml file, and a devcontainer.json file. The dev containers have features such as a database (SQLite, Postgres, MySQL, or MariaDB) and a headless Chrome container for system tests.
