I used gcov to get C statement level coverage for the core. It takes a long time to run make test this way. :-) I've put the results online, if anyone is interested. You can get 1.5M of compressed tarball at http://www.ccl4.org/~nick/P/23712-g-gcov.tar.bz2 or browse them at http://www.ccl4.org/~nick/P/23712-g-gcov/ It's bleadperl, patchlevel 23712 built without threads, with -g, on x86 FreeBSD 5.3 with FreeBSD's gcc 3.4.2 Nicholas Clark