You could avoid copying the large hash by using a reference: 
my $thingy_ref = \%Foo::Bar::Baz::thingy;

foreach my $key ( keys %$thingy_ref ){
    print "$key => $thingy_ref->{ $key }\n";
}

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In reply to Re^2: Being impervious to an 'each' reset by duckyd
in thread Being impervious to an 'each' reset by throop

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