GNU Guile 2.9.3 (beta) released

Andy Wingo — August 3, 2019

We are delighted to announce GNU Guile 2.9.3, the third beta release in preparation for the upcoming 3.0 stable series. See the release announcement for full details and a download link.

This release improves the quality of the just-in-time (JIT) native code generation, resulting in up to 50% performance improvements on some workloads. See the article "Fibs, lies, and benchmarks" for an in-depth discussion of some of the specific improvements.

GNU Guile 2.9.3 is a beta release, and as such offers no API or ABI stability guarantees. Users needing a stable Guile are advised to stay on the stable 2.2 series.

Experience reports with GNU Guile 2.9.3, good or bad, are very welcome; send them to If you know you found a bug, please do send a note to Happy hacking!