I am surprised that no one to this point has brought up the Programming Language Shootout. It compares many languages across some simple problems. (I'm not sure whether or not it would allow Arc at this point, since widespread use is a criterion for inclusion -- but there's nothing stopping someone from writing the programs for comparison.)
Note that the shootout compares code size using gzipped size -- which should be even more generous to Lisps than PG's token count, due to the easily compressible parens. However, Lisp and Scheme actually do quite poorly by this metric, even ranking below some statically typed languages, while Python, Perl, and Ruby do particularly well. I'd love to see where Arc would rank, considering that it was designed with brevity in mind.
http://shootout.alioth.debian.org/gp4sandbox/benchmark.php?t...
Note that the shootout compares code size using gzipped size -- which should be even more generous to Lisps than PG's token count, due to the easily compressible parens. However, Lisp and Scheme actually do quite poorly by this metric, even ranking below some statically typed languages, while Python, Perl, and Ruby do particularly well. I'd love to see where Arc would rank, considering that it was designed with brevity in mind.