With compilation-speed proclamation, don't set speed to iverse value (!241) · Merge requests · Embeddable Common-Lisp / ECL · GitLab

prior to the fix (declaim (optimize (compilation-speed 0))) would set the quality for speed to 3 which is not intuitive
for the moment accept the proclamation, but don't change anything
in the long run, use this value to decide on long running optimizations