I was somewhat disappointed as well. I wrote some tests here: http://paste.lisp.org/display/140280 http://paste.lisp.org/display/140280 Perhaps playing around

I was somewhat disappointed as well. I wrote some tests here: http://paste.lisp.org/display/140280 http://paste.lisp.org/display/140280 Perhaps playing around with different internal representations as pointed out by sedachv (https://news.ycombinator.com/item?id=6811407 https://news.ycombinator.com/item?id=6811407) would work but the initial, naive string usage doesn't work. While I expected the default usage to work correctly in Common Lisp.