This is Perl module Devel::NYTProf::Callgrind::TicksDiff. INSTALLATION Devel::NYTProf::Callgrind::TicksDiff installation is straightforward. If your CPAN shell is set up, you should just be able to do % cpan Devel::NYTProf::Callgrind::TicksDiff Download it, unpack it, then build it as per the usual: % perl Makefile.PL % make && make test Then install it: % make install DOCUMENTATION Devel::NYTProf::Callgrind::TicksDiff documentation is available as in POD. So you can do: % perldoc Devel::NYTProf::Callgrind::TicksDiff to read the documentation online with your favorite pager. ahernit