stupid optimization question

[Jonathan Vanasco <suppressed>]

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 ) {}
	}

?