Hello,
Diff between ABCL 1.3.1 and the current dev version (svn revision 14755):
https://common-lisp.net/project/cl-test-grid/abcl/abcl-diff25.html
Unfortunately there are only regressions.
(The green results for cffi-libffi are due to installed libffi-dev on the testing machine,
not because of ABCL improvement)
Best regards,
- Anton