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LibJS: Use OrderedHashMap for the Shape property table

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This allows us to get rid of property_table_ordered() which was a
heavy-handed way of iterating properties in insertion order by first
copying them to a sorted Vector.

Clients can now simply iterate property_table() directly.

3% speed-up on Kraken/ai-astar.js :^)
This commit is contained in:
Andreas Kling 2023-09-17 11:29:43 +02:00
parent 8ce9e51c97
commit e33145aa4b
7 changed files with 13 additions and 27 deletions
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16
Userland/Libraries/LibJS/Runtime/Shape.cpp
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@ -136,29 +136,17 @@ Optional<PropertyMetadata> Shape::lookup(StringOrSymbol const& property_key) con
return property;
}
FLATTEN HashMap<StringOrSymbol, PropertyMetadata> const& Shape::property_table() const
FLATTEN OrderedHashMap<StringOrSymbol, PropertyMetadata> const& Shape::property_table() const
{
ensure_property_table();
return *m_property_table;
}
Vector<Shape::Property> Shape::property_table_ordered() const
{
auto vec = Vector<Shape::Property>();
vec.resize(property_count());
for (auto& it : property_table()) {
vec[it.value.offset] = { it.key, it.value };
}
return vec;
}
void Shape::ensure_property_table() const
{
if (m_property_table)
return;
m_property_table = make<HashMap<StringOrSymbol, PropertyMetadata>>();
m_property_table = make<OrderedHashMap<StringOrSymbol, PropertyMetadata>>();
u32 next_offset = 0;