FYI: the trunk version of Moose and Class::MOP appear to resolve this performance issue for us (thanks to 'sartak' on Twitter for the heads up).
Cheers, Ovid -- Buy the book - http://www.oreilly.com/catalog/perlhks/ Tech blog - http://use.perl.org/~Ovid/journal/ Twitter - http://twitter.com/OvidPerl Official Perl 6 Wiki - http://www.perlfoundation.org/perl6