Perl's object system is famously flexible. bless a reference, add some accessors, and you're in business. Over the years, modules like Moose, Moo, and Mouse have built increasingly sophisticated layers on top of that foundation — giving us type constraints, roles, lazy attributes, and declarative syntax.

But they all share the same bedrock: a blessed hash reference .

Object::Proto takes a less used approach. It stores objects as blessed arrays , maps property names to slot indices at compile time, and compiles accessors down to custom ops — the same mechanism Perl uses internally for built-in operations.…