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LibJS: Add a number-indexed property storage to all Objects

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Objects can have both named and indexed properties. Previously we kept
all property names as strings. This patch separates named and indexed
properties and splits them between Object::m_storage and m_elements.

This allows us to do much faster array-style access using numeric
indices. It also makes the Array class much less special, since all
Objects now have number-indexed storage. :^)
This commit is contained in:
Andreas Kling 2020-04-06 16:53:02 +02:00
parent 65dd9d5ad3
commit 90ba0145f6
6 changed files with 69 additions and 50 deletions
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9
Libraries/LibJS/Runtime/Array.h
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@ -35,9 +35,7 @@ public:
Array();
virtual ~Array() override;
i32 length() const { return static_cast<i32>(m_elements.size()); }
const Vector<Value>& elements() const { return m_elements; }
Vector<Value>& elements() { return m_elements; }
i32 length() const { return static_cast<i32>(elements().size()); }
Value shift();
Value pop();
@ -45,15 +43,10 @@ public:
private:
virtual const char* class_name() const override { return "Array"; }
virtual void visit_children(Cell::Visitor&) override;
virtual bool is_array() const override { return true; }
virtual Optional<Value> get_own_property(const Object& this_object, const FlyString& property_name) const override;
virtual bool put_own_property(Object& this_object, const FlyString& property_name, Value) override;
static Value length_getter(Interpreter&);
static void length_setter(Interpreter&, Value);
Vector<Value> m_elements;
};
}