GNU Guile 2.9.7 (beta) released

Andy Wingo — December 13, 2019

We are delighted to announce GNU Guile 2.9.7, the seventh and hopefully penultimate beta release in preparation for the upcoming 3.0 stable series. See the release announcement for full details and a download link.

This release makes Guile go faster. Compared to 2.9.6 there are some significant improvements:

Comparison of microbenchmark performance for Guile 2.9.6 and 2.9.7

The cumulative comparison against 2.2 is finally looking like we have no significant regressions:

Comparison of microbenchmark performance for Guile 2.2.6 and 2.9.7

Now we're on the home stretch! Hopefully we'll get out just one more prerelease and then release a stable Guile 3.0.0 in January. However until then, note that GNU Guile 2.9.7 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.

As always, experience reports with GNU Guile 2.9.7, good or bad, are very welcome; send them to If you know you found a bug, please do send a note to Happy hacking!