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LibJS: Add common fast path for GetByValue from TypedArray

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Same exact idea as the previous commit, just for GetByValue. :^)
This commit is contained in:
Andreas Kling 2023-11-25 18:50:23 +01:00
parent 51ac0d8821
commit 1bc58333f8
Notes: sideshowbarker 2024-07-17 09:56:35 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/1bc58333f8
Pull-request: https://github.com/SerenityOS/serenity/pull/22058
1 changed files with 23 additions and 7 deletions
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30
Userland/Libraries/LibJS/Bytecode/CommonImplementations.cpp
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@ -71,13 +71,29 @@ ThrowCompletionOr<Value> get_by_value(VM& vm, Value base_value, Value property_k
auto object = TRY(base_object_for_get(vm, base_value));
// OPTIMIZATION: Fast path for simple Int32 indexes in array-like objects.
if (property_key_value.is_int32()
&& property_key_value.as_i32() >= 0
&& !object->may_interfere_with_indexed_property_access()
&& object->indexed_properties().has_index(property_key_value.as_i32())) {
auto value = object->indexed_properties().get(property_key_value.as_i32())->value;
if (!value.is_accessor())
return value;
if (property_key_value.is_int32() && property_key_value.as_i32() >= 0) {
auto index = static_cast<u32>(property_key_value.as_i32());
// For "non-typed arrays":
if (!object->may_interfere_with_indexed_property_access()
&& object->indexed_properties().has_index(index)) {
auto value = object->indexed_properties().get(index)->value;
if (!value.is_accessor())
return value;
}
// For typed arrays:
if (object->is_typed_array()) {
auto& typed_array = static_cast<TypedArrayBase&>(*object);
auto canonical_index = CanonicalIndex { CanonicalIndex::Type::Index, index };
switch (typed_array.kind()) {
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, Type) \
case TypedArrayBase::Kind::ClassName: \
return integer_indexed_element_get<Type>(typed_array, canonical_index);
JS_ENUMERATE_TYPED_ARRAYS
#undef __JS_ENUMERATE
}
}
}
auto property_key = TRY(property_key_value.to_property_key(vm));