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LibJS: Ensure keys vector capacity in Object::internal_own_property_keys

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12% improvement on MicroBench/object-keys.js
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Aliaksandr Kalenik 2025-05-14 15:57:30 +03:00 • committed by Alexander Kalenik
parent 5ee810f772
commit 27ba216e3f
Notes: github-actions[bot] 2025-05-15 18:13:17 +00:00
1 changed files with 1 additions and 0 deletions
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Libraries/LibJS/Runtime/Object.cpp
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@ -1112,6 +1112,7 @@ ThrowCompletionOr<Vector<PropertyKey>> Object::internal_own_property_keys() cons
{ {
// 1. Let keys be a new empty List. // 1. Let keys be a new empty List.
Vector<PropertyKey> keys; Vector<PropertyKey> keys;
keys.ensure_capacity(m_indexed_properties.real_size() + shape().property_count());
// 2. For each own property key P of O such that P is an array index, in ascending numeric index order, do // 2. For each own property key P of O such that P is an array index, in ascending numeric index order, do
for (auto const& entry : m_indexed_properties) { for (auto const& entry : m_indexed_properties) {