This page is part of the web mail archives of SRFI 32 from before July 7th, 2015. The new archives for SRFI 32 contain all messages, not just those from before July 7th, 2015.
DOH! I finally understood an earlier comment someone else made about <= being worse for stable sorting. This is because with a partial rather than total order, (< x y) !=== (not (<= y x)), but rather (< x y) === (and (<= x y) (not (<= y x))) It seems plausible that this is why CL did what it did. Probably more efficient... David