stupid optimization question

[Jonathan Vanasco]

I apologize for the stupidity of this in advance-- its just something  
that I thought of in relation to mod_perl after starting a discussion  
on perlmonks about use constant vs sub(){} ...


does anyone know if there is a memory/other difference under mod_perl  
for

        sub a {
                my      @items= qw| 1 2 3 |;
                foreach my $a ( @items ) {}
        }

vs

        my      @_b_items= qw| 1 2 3 |;
        sub b {
                foreach my $b ( @ _b_items ) {}
        }

?