If you realize that Perl 6 basically has Moose in its core, and you compare startup time of Perl 5 with Moose with Perl 6, then it's not that bad at all: $

If you realize that Perl 6 basically has Moose in its core, and you compare startup time of Perl 5 with Moose with Perl 6, then it's not that bad at all: $ time perl6 -e '' real 0m0.120s $ time perl -MMoose -e '' real 0m0.131s And that's without all of the fancy type checking stuff of several Moose plugins that comes standard with Perl 6. So in that sense, if you are interested in Moose functionality, you're better of in Perl 6.