At http://www.perlfoundation.org/perl5/index.cgi?gsoc2008_projects#make_built_in_list_functions_continuous I spot: Make built-in list functions continuous Functions like map often build up intermediate lists unnecessarily, fix this. Mentor: wren ng thornton I was wondering if you had more detail on this, as it's not something currently in the core's TODO file: http://mirrors.develooper.com/perl/APC/perl-current/pod/perltodo.pod Nicholas ClarkThread Next