Chicken Scheme 6.0 Released

Call‑CC, the Scheme implementation known for its lightweight design and strong support for continuations, has released version 6.0.0. The update, announced on the project’s official release page, brings a suite of new features and stability improvements that build on the foundation laid by earlier releases. Key additions include a revamped standard library, enhanced support for modern Scheme syntax, and a new garbage‑collection strategy that reduces pause times in long‑running programs.

The 6.0.0 release also addresses a number of long‑standing bugs and performance regressions. Developers report that the new compiler passes cut down on code size for common idioms, while the updated runtime now handles large data sets more efficiently. Documentation has been expanded to cover the new API surface, and the test suite has been extended to cover edge cases that previously caused sporadic failures.

The announcement has attracted modest attention in the broader programming community, with the Hacker News discussion page receiving 41 points and four comments. Contributors highlighted the improved ergonomics and the potential for Call‑CC to serve as a drop‑in replacement for more heavyweight Scheme environments in educational and research settings. The release marks a significant milestone for the project, positioning it as a more competitive option for developers seeking a modern, standards‑compliant Scheme runtime.