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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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7
Libraries/LibJS/Runtime/Object.h
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@ -43,7 +43,10 @@ public:
Shape& shape() { return *m_shape; }
const Shape& shape() const { return *m_shape; }
Optional<Value> get_by_index(i32 property_index) const;
Optional<Value> get(const FlyString& property_name) const;
void put_by_index(i32 property_index, Value);
void put(const FlyString& property_name, Value);
virtual Optional<Value> get_own_property(const Object& this_object, const FlyString& property_name) const;
@ -81,11 +84,15 @@ public:
Value get_direct(size_t index) const { return m_storage[index]; }
const Vector<Value>& elements() const { return m_elements; }
Vector<Value>& elements() { return m_elements; }
private:
void set_shape(Shape&);
Shape* m_shape { nullptr };
Vector<Value> m_storage;
Vector<Value> m_elements;
};
}